256216760

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{71971}}^1$

素因数の和:72071

約数の個数: 32

約数和(自身を含む): 582973200

約数和(自身を除く): 326756440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 71971, 143942, 287884, 359855, 575768, 719710, 1439420, 2878840, 6405419, 12810838, 25621676, 32027095, 51243352, 64054190, 128108380, 256216760]

約数ペア:

[(1, 256216760), (2, 128108380), (4, 64054190), (5, 51243352), (8, 32027095), (10, 25621676), (20, 12810838), (40, 6405419), (89, 2878840), (178, 1439420), (356, 719710), (445, 575768), (712, 359855), (890, 287884), (1780, 143942), (3560, 71971)]