81256640

素因数分解:

$2^6\times 5^1\times {\mathrm{271}}^1\times {\mathrm{937}}^1$

素因数の和:1225

約数の個数: 56

約数和(自身を含む): 194413632

約数和(自身を除く): 113156992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 271, 320, 542, 937, 1084, 1355, 1874, 2168, 2710, 3748, 4336, 4685, 5420, 7496, 8672, 9370, 10840, 14992, 17344, 18740, 21680, 29984, 37480, 43360, 59968, 74960, 86720, 149920, 253927, 299840, 507854, 1015708, 1269635, 2031416, 2539270, 4062832, 5078540, 8125664, 10157080, 16251328, 20314160, 40628320, 81256640]

約数ペア:

[(1, 81256640), (2, 40628320), (4, 20314160), (5, 16251328), (8, 10157080), (10, 8125664), (16, 5078540), (20, 4062832), (32, 2539270), (40, 2031416), (64, 1269635), (80, 1015708), (160, 507854), (271, 299840), (320, 253927), (542, 149920), (937, 86720), (1084, 74960), (1355, 59968), (1874, 43360), (2168, 37480), (2710, 29984), (3748, 21680), (4336, 18740), (4685, 17344), (5420, 14992), (7496, 10840), (8672, 9370)]