664152040

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{78691}}^1$

素因数の和:78913

約数の個数: 32

約数和(自身を含む): 1501443360

約数和(自身を除く): 837291320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 78691, 157382, 314764, 393455, 629528, 786910, 1573820, 3147640, 16603801, 33207602, 66415204, 83019005, 132830408, 166038010, 332076020, 664152040]

約数ペア:

[(1, 664152040), (2, 332076020), (4, 166038010), (5, 132830408), (8, 83019005), (10, 66415204), (20, 33207602), (40, 16603801), (211, 3147640), (422, 1573820), (844, 786910), (1055, 629528), (1688, 393455), (2110, 314764), (4220, 157382), (8440, 78691)]