21681660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:81

約数の個数: 288

約数和(自身を含む): 86026752

約数和(自身を除く): 64345092

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 19, 20, 21, 22, 26, 28, 30, 33, 35, 38, 39, 42, 44, 52, 55, 57, 60, 65, 66, 70, 76, 77, 78, 84, 91, 95, 105, 110, 114, 130, 132, 133, 140, 143, 154, 156, 165, 182, 190, 195, 209, 210, 220, 228, 231, 247, 260, 266, 273, 285, 286, 308, 330, 361, 364, 380, 385, 390, 399, 418, 420, 429, 455, 462, 494, 532, 546, 570, 572, 627, 660, 665, 715, 722, 741, 770, 780, 798, 836, 858, 910, 924, 988, 1001, 1045, 1083, 1092, 1140, 1155, 1235, 1254, 1330, 1365, 1430, 1444, 1463, 1482, 1540, 1596, 1716, 1729, 1805, 1820, 1995, 2002, 2090, 2145, 2166, 2310, 2470, 2508, 2527, 2660, 2717, 2730, 2860, 2926, 2964, 3003, 3135, 3458, 3610, 3705, 3971, 3990, 4004, 4180, 4290, 4332, 4389, 4620, 4693, 4940, 5005, 5054, 5187, 5415, 5434, 5460, 5852, 6006, 6270, 6916, 7220, 7315, 7410, 7581, 7942, 7980, 8151, 8580, 8645, 8778, 9386, 10010, 10108, 10374, 10830, 10868, 11913, 12012, 12540, 12635, 13585, 14079, 14630, 14820, 15015, 15162, 15884, 16302, 17290, 17556, 18772, 19019, 19855, 20020, 20748, 21660, 21945, 23465, 23826, 25270, 25935, 27170, 27797, 28158, 29260, 30030, 30324, 32604, 32851, 34580, 37905, 38038, 39710, 40755, 43890, 46930, 47652, 50540, 51623, 51870, 54340, 55594, 56316, 57057, 59565, 60060, 65702, 70395, 75810, 76076, 79420, 81510, 83391, 87780, 93860, 95095, 98553, 103246, 103740, 111188, 114114, 119130, 131404, 138985, 140790, 151620, 154869, 163020, 164255, 166782, 190190, 197106, 206492, 228228, 238260, 258115, 277970, 281580, 285285, 309738, 328510, 333564, 361361, 380380, 394212, 416955, 492765, 516230, 555940, 570570, 619476, 657020, 722722, 774345, 833910, 985530, 1032460, 1084083, 1141140, 1445444, 1548690, 1667820, 1806805, 1971060, 2168166, 3097380, 3613610, 4336332, 5420415, 7227220, 10840830, 21681660]

約数ペア:

[(1, 21681660), (2, 10840830), (3, 7227220), (4, 5420415), (5, 4336332), (6, 3613610), (7, 3097380), (10, 2168166), (11, 1971060), (12, 1806805), (13, 1667820), (14, 1548690), (15, 1445444), (19, 1141140), (20, 1084083), (21, 1032460), (22, 985530), (26, 833910), (28, 774345), (30, 722722), (33, 657020), (35, 619476), (38, 570570), (39, 555940), (42, 516230), (44, 492765), (52, 416955), (55, 394212), (57, 380380), (60, 361361), (65, 333564), (66, 328510), (70, 309738), (76, 285285), (77, 281580), (78, 277970), (84, 258115), (91, 238260), (95, 228228), (105, 206492), (110, 197106), (114, 190190), (130, 166782), (132, 164255), (133, 163020), (140, 154869), (143, 151620), (154, 140790), (156, 138985), (165, 131404), (182, 119130), (190, 114114), (195, 111188), (209, 103740), (210, 103246), (220, 98553), (228, 95095), (231, 93860), (247, 87780), (260, 83391), (266, 81510), (273, 79420), (285, 76076), (286, 75810), (308, 70395), (330, 65702), (361, 60060), (364, 59565), (380, 57057), (385, 56316), (390, 55594), (399, 54340), (418, 51870), (420, 51623), (429, 50540), (455, 47652), (462, 46930), (494, 43890), (532, 40755), (546, 39710), (570, 38038), (572, 37905), (627, 34580), (660, 32851), (665, 32604), (715, 30324), (722, 30030), (741, 29260), (770, 28158), (780, 27797), (798, 27170), (836, 25935), (858, 25270), (910, 23826), (924, 23465), (988, 21945), (1001, 21660), (1045, 20748), (1083, 20020), (1092, 19855), (1140, 19019), (1155, 18772), (1235, 17556), (1254, 17290), (1330, 16302), (1365, 15884), (1430, 15162), (1444, 15015), (1463, 14820), (1482, 14630), (1540, 14079), (1596, 13585), (1716, 12635), (1729, 12540), (1805, 12012), (1820, 11913), (1995, 10868), (2002, 10830), (2090, 10374), (2145, 10108), (2166, 10010), (2310, 9386), (2470, 8778), (2508, 8645), (2527, 8580), (2660, 8151), (2717, 7980), (2730, 7942), (2860, 7581), (2926, 7410), (2964, 7315), (3003, 7220), (3135, 6916), (3458, 6270), (3610, 6006), (3705, 5852), (3971, 5460), (3990, 5434), (4004, 5415), (4180, 5187), (4290, 5054), (4332, 5005), (4389, 4940), (4620, 4693)]