256755660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{611323}}^1$

素因数の和:611342

約数の個数: 48

約数和(自身を含む): 821619456

約数和(自身を除く): 564863796

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 611323, 1222646, 1833969, 2445292, 3056615, 3667938, 4279261, 6113230, 7335876, 8558522, 9169845, 12226460, 12837783, 17117044, 18339690, 21396305, 25675566, 36679380, 42792610, 51351132, 64188915, 85585220, 128377830, 256755660]

約数ペア:

[(1, 256755660), (2, 128377830), (3, 85585220), (4, 64188915), (5, 51351132), (6, 42792610), (7, 36679380), (10, 25675566), (12, 21396305), (14, 18339690), (15, 17117044), (20, 12837783), (21, 12226460), (28, 9169845), (30, 8558522), (35, 7335876), (42, 6113230), (60, 4279261), (70, 3667938), (84, 3056615), (105, 2445292), (140, 1833969), (210, 1222646), (420, 611323)]