21261457980

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{653}}^1\times {\mathrm{25841}}^1$

素因数の和:26516

約数の個数: 144

約数和(自身を含む): 73822117824

約数和(自身を除く): 52560659844

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 653, 1260, 1306, 1959, 2612, 3265, 3918, 4571, 5877, 6530, 7836, 9142, 9795, 11754, 13060, 13713, 18284, 19590, 22855, 23508, 25841, 27426, 29385, 39180, 41139, 45710, 51682, 54852, 58770, 68565, 77523, 82278, 91420, 103364, 117540, 129205, 137130, 155046, 164556, 180887, 205695, 232569, 258410, 274260, 310092, 361774, 387615, 411390, 465138, 516820, 542661, 723548, 775230, 822780, 904435, 930276, 1085322, 1162845, 1550460, 1627983, 1808870, 2170644, 2325690, 2713305, 3255966, 3617740, 4651380, 5426610, 6511932, 8139915, 10853220, 16279830, 16874173, 32559660, 33748346, 50622519, 67496692, 84370865, 101245038, 118119211, 151867557, 168741730, 202490076, 236238422, 253112595, 303735114, 337483460, 354357633, 472476844, 506225190, 590596055, 607470228, 708715266, 759337785, 1012450380, 1063072899, 1181192110, 1417430532, 1518675570, 1771788165, 2126145798, 2362384220, 3037351140, 3543576330, 4252291596, 5315364495, 7087152660, 10630728990, 21261457980]

約数ペア:

[(1, 21261457980), (2, 10630728990), (3, 7087152660), (4, 5315364495), (5, 4252291596), (6, 3543576330), (7, 3037351140), (9, 2362384220), (10, 2126145798), (12, 1771788165), (14, 1518675570), (15, 1417430532), (18, 1181192110), (20, 1063072899), (21, 1012450380), (28, 759337785), (30, 708715266), (35, 607470228), (36, 590596055), (42, 506225190), (45, 472476844), (60, 354357633), (63, 337483460), (70, 303735114), (84, 253112595), (90, 236238422), (105, 202490076), (126, 168741730), (140, 151867557), (180, 118119211), (210, 101245038), (252, 84370865), (315, 67496692), (420, 50622519), (630, 33748346), (653, 32559660), (1260, 16874173), (1306, 16279830), (1959, 10853220), (2612, 8139915), (3265, 6511932), (3918, 5426610), (4571, 4651380), (5877, 3617740), (6530, 3255966), (7836, 2713305), (9142, 2325690), (9795, 2170644), (11754, 1808870), (13060, 1627983), (13713, 1550460), (18284, 1162845), (19590, 1085322), (22855, 930276), (23508, 904435), (25841, 822780), (27426, 775230), (29385, 723548), (39180, 542661), (41139, 516820), (45710, 465138), (51682, 411390), (54852, 387615), (58770, 361774), (68565, 310092), (77523, 274260), (82278, 258410), (91420, 232569), (103364, 205695), (117540, 180887), (129205, 164556), (137130, 155046)]