387904040

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{43487}}^1$

素因数の和:43721

約数の個数: 32

約数和(自身を含む): 876718080

約数和(自身を除く): 488814040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 4460, 8920, 43487, 86974, 173948, 217435, 347896, 434870, 869740, 1739480, 9697601, 19395202, 38790404, 48488005, 77580808, 96976010, 193952020, 387904040]

約数ペア:

[(1, 387904040), (2, 193952020), (4, 96976010), (5, 77580808), (8, 48488005), (10, 38790404), (20, 19395202), (40, 9697601), (223, 1739480), (446, 869740), (892, 434870), (1115, 347896), (1784, 217435), (2230, 173948), (4460, 86974), (8920, 43487)]