256749440

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{12941}}^1$

素因数の和:12991

約数の個数: 64

約数和(自身を含む): 633640320

約数和(自身を除く): 376890880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 12941, 19840, 25882, 51764, 64705, 103528, 129410, 207056, 258820, 401171, 414112, 517640, 802342, 828224, 1035280, 1604684, 1656448, 2005855, 2070560, 3209368, 4011710, 4141120, 6418736, 8023420, 8282240, 12837472, 16046840, 25674944, 32093680, 51349888, 64187360, 128374720, 256749440]

約数ペア:

[(1, 256749440), (2, 128374720), (4, 64187360), (5, 51349888), (8, 32093680), (10, 25674944), (16, 16046840), (20, 12837472), (31, 8282240), (32, 8023420), (40, 6418736), (62, 4141120), (64, 4011710), (80, 3209368), (124, 2070560), (128, 2005855), (155, 1656448), (160, 1604684), (248, 1035280), (310, 828224), (320, 802342), (496, 517640), (620, 414112), (640, 401171), (992, 258820), (1240, 207056), (1984, 129410), (2480, 103528), (3968, 64705), (4960, 51764), (9920, 25882), (12941, 19840)]