64889960

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{3251}}^1$

素因数の和:3761

約数の個数: 32

約数和(自身を含む): 146340000

約数和(自身を除く): 81450040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1996, 2495, 3251, 3992, 4990, 6502, 9980, 13004, 16255, 19960, 26008, 32510, 65020, 130040, 1622249, 3244498, 6488996, 8111245, 12977992, 16222490, 32444980, 64889960]

約数ペア:

[(1, 64889960), (2, 32444980), (4, 16222490), (5, 12977992), (8, 8111245), (10, 6488996), (20, 3244498), (40, 1622249), (499, 130040), (998, 65020), (1996, 32510), (2495, 26008), (3251, 19960), (3992, 16255), (4990, 13004), (6502, 9980)]