21008988

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1$

素因数の和:105

約数の個数: 216

約数和(自身を含む): 73198944

約数和(自身を除く): 52189956

約数列:

[1, 2, 3, 4, 6, 7, 9, 11, 12, 13, 14, 18, 21, 22, 26, 28, 33, 36, 39, 42, 44, 52, 53, 63, 66, 77, 78, 84, 91, 99, 106, 117, 121, 126, 132, 143, 154, 156, 159, 182, 198, 212, 231, 234, 242, 252, 273, 286, 308, 318, 363, 364, 371, 396, 429, 462, 468, 477, 484, 546, 572, 583, 636, 689, 693, 726, 742, 819, 847, 858, 924, 954, 1001, 1089, 1092, 1113, 1166, 1287, 1378, 1386, 1452, 1484, 1573, 1638, 1694, 1716, 1749, 1908, 2002, 2067, 2178, 2226, 2332, 2541, 2574, 2756, 2772, 3003, 3146, 3276, 3339, 3388, 3498, 4004, 4081, 4134, 4356, 4452, 4719, 4823, 5082, 5148, 5247, 6006, 6201, 6292, 6413, 6678, 6996, 7579, 7623, 8162, 8268, 9009, 9438, 9646, 10164, 10494, 11011, 12012, 12243, 12402, 12826, 13356, 14157, 14469, 15158, 15246, 16324, 18018, 18876, 19239, 19292, 20988, 22022, 22737, 24486, 24804, 25652, 28314, 28938, 30316, 30492, 33033, 36036, 36729, 38478, 43407, 44044, 44891, 45474, 48972, 53053, 56628, 57717, 57876, 66066, 68211, 73458, 76956, 83369, 86814, 89782, 90948, 99099, 106106, 115434, 132132, 134673, 136422, 146916, 159159, 166738, 173628, 179564, 198198, 212212, 230868, 250107, 269346, 272844, 318318, 333476, 396396, 404019, 477477, 500214, 538692, 583583, 636636, 750321, 808038, 954954, 1000428, 1167166, 1500642, 1616076, 1750749, 1909908, 2334332, 3001284, 3501498, 5252247, 7002996, 10504494, 21008988]

約数ペア:

[(1, 21008988), (2, 10504494), (3, 7002996), (4, 5252247), (6, 3501498), (7, 3001284), (9, 2334332), (11, 1909908), (12, 1750749), (13, 1616076), (14, 1500642), (18, 1167166), (21, 1000428), (22, 954954), (26, 808038), (28, 750321), (33, 636636), (36, 583583), (39, 538692), (42, 500214), (44, 477477), (52, 404019), (53, 396396), (63, 333476), (66, 318318), (77, 272844), (78, 269346), (84, 250107), (91, 230868), (99, 212212), (106, 198198), (117, 179564), (121, 173628), (126, 166738), (132, 159159), (143, 146916), (154, 136422), (156, 134673), (159, 132132), (182, 115434), (198, 106106), (212, 99099), (231, 90948), (234, 89782), (242, 86814), (252, 83369), (273, 76956), (286, 73458), (308, 68211), (318, 66066), (363, 57876), (364, 57717), (371, 56628), (396, 53053), (429, 48972), (462, 45474), (468, 44891), (477, 44044), (484, 43407), (546, 38478), (572, 36729), (583, 36036), (636, 33033), (689, 30492), (693, 30316), (726, 28938), (742, 28314), (819, 25652), (847, 24804), (858, 24486), (924, 22737), (954, 22022), (1001, 20988), (1089, 19292), (1092, 19239), (1113, 18876), (1166, 18018), (1287, 16324), (1378, 15246), (1386, 15158), (1452, 14469), (1484, 14157), (1573, 13356), (1638, 12826), (1694, 12402), (1716, 12243), (1749, 12012), (1908, 11011), (2002, 10494), (2067, 10164), (2178, 9646), (2226, 9438), (2332, 9009), (2541, 8268), (2574, 8162), (2756, 7623), (2772, 7579), (3003, 6996), (3146, 6678), (3276, 6413), (3339, 6292), (3388, 6201), (3498, 6006), (4004, 5247), (4081, 5148), (4134, 5082), (4356, 4823), (4452, 4719)]