21686451990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1\times {\mathrm{409}}^1$

素因数の和:679

約数の個数: 256

約数和(自身を含む): 63876556800

約数和(自身を除く): 42190104810

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 57, 70, 95, 97, 105, 114, 133, 137, 190, 194, 210, 266, 274, 285, 291, 399, 409, 411, 485, 570, 582, 665, 679, 685, 798, 818, 822, 959, 970, 1227, 1330, 1358, 1370, 1455, 1843, 1918, 1995, 2037, 2045, 2055, 2454, 2603, 2863, 2877, 2910, 3395, 3686, 3990, 4074, 4090, 4110, 4795, 5206, 5529, 5726, 5754, 6135, 6790, 7771, 7809, 8589, 9215, 9590, 10185, 11058, 12270, 12901, 13015, 13289, 14315, 14385, 15542, 15618, 17178, 18221, 18430, 20370, 23313, 25802, 26030, 26578, 27645, 28630, 28770, 36442, 38703, 38855, 39045, 39673, 39867, 42945, 46626, 54397, 54663, 55290, 56033, 64505, 66445, 77406, 77710, 78090, 79346, 79734, 85890, 91105, 93023, 108794, 109326, 112066, 116565, 119019, 129010, 132890, 163191, 168099, 182210, 186046, 193515, 198365, 199335, 233130, 238038, 252491, 271985, 273315, 277711, 279069, 280165, 326382, 336198, 387030, 392231, 396730, 398670, 465115, 504982, 543970, 546630, 555422, 558138, 560330, 595095, 753787, 757473, 784462, 815955, 833133, 840495, 930230, 1064627, 1176693, 1190190, 1262455, 1388555, 1395345, 1507574, 1514946, 1631910, 1666266, 1680990, 1767437, 1961155, 2129254, 2261361, 2353386, 2524910, 2777110, 2790690, 3193881, 3534874, 3768935, 3787365, 3922310, 4165665, 4522722, 5276509, 5302311, 5323135, 5435201, 5883465, 6387762, 7452389, 7537870, 7574730, 8331330, 8837185, 10553018, 10604622, 10646270, 10870402, 11306805, 11766930, 14904778, 15829527, 15969405, 16305603, 17674370, 22357167, 22613610, 26382545, 26511555, 27176005, 31659054, 31938810, 32611206, 37261945, 38046407, 44714334, 52765090, 53023110, 54352010, 74523890, 76092814, 79147635, 81528015, 103268819, 111785835, 114139221, 158295270, 163056030, 190232035, 206537638, 223571670, 228278442, 309806457, 380464070, 516344095, 570696105, 619612914, 722881733, 1032688190, 1141392210, 1445763466, 1549032285, 2168645199, 3098064570, 3614408665, 4337290398, 7228817330, 10843225995, 21686451990]

約数ペア:

[(1, 21686451990), (2, 10843225995), (3, 7228817330), (5, 4337290398), (6, 3614408665), (7, 3098064570), (10, 2168645199), (14, 1549032285), (15, 1445763466), (19, 1141392210), (21, 1032688190), (30, 722881733), (35, 619612914), (38, 570696105), (42, 516344095), (57, 380464070), (70, 309806457), (95, 228278442), (97, 223571670), (105, 206537638), (114, 190232035), (133, 163056030), (137, 158295270), (190, 114139221), (194, 111785835), (210, 103268819), (266, 81528015), (274, 79147635), (285, 76092814), (291, 74523890), (399, 54352010), (409, 53023110), (411, 52765090), (485, 44714334), (570, 38046407), (582, 37261945), (665, 32611206), (679, 31938810), (685, 31659054), (798, 27176005), (818, 26511555), (822, 26382545), (959, 22613610), (970, 22357167), (1227, 17674370), (1330, 16305603), (1358, 15969405), (1370, 15829527), (1455, 14904778), (1843, 11766930), (1918, 11306805), (1995, 10870402), (2037, 10646270), (2045, 10604622), (2055, 10553018), (2454, 8837185), (2603, 8331330), (2863, 7574730), (2877, 7537870), (2910, 7452389), (3395, 6387762), (3686, 5883465), (3990, 5435201), (4074, 5323135), (4090, 5302311), (4110, 5276509), (4795, 4522722), (5206, 4165665), (5529, 3922310), (5726, 3787365), (5754, 3768935), (6135, 3534874), (6790, 3193881), (7771, 2790690), (7809, 2777110), (8589, 2524910), (9215, 2353386), (9590, 2261361), (10185, 2129254), (11058, 1961155), (12270, 1767437), (12901, 1680990), (13015, 1666266), (13289, 1631910), (14315, 1514946), (14385, 1507574), (15542, 1395345), (15618, 1388555), (17178, 1262455), (18221, 1190190), (18430, 1176693), (20370, 1064627), (23313, 930230), (25802, 840495), (26030, 833133), (26578, 815955), (27645, 784462), (28630, 757473), (28770, 753787), (36442, 595095), (38703, 560330), (38855, 558138), (39045, 555422), (39673, 546630), (39867, 543970), (42945, 504982), (46626, 465115), (54397, 398670), (54663, 396730), (55290, 392231), (56033, 387030), (64505, 336198), (66445, 326382), (77406, 280165), (77710, 279069), (78090, 277711), (79346, 273315), (79734, 271985), (85890, 252491), (91105, 238038), (93023, 233130), (108794, 199335), (109326, 198365), (112066, 193515), (116565, 186046), (119019, 182210), (129010, 168099), (132890, 163191)]