64690040

素因数分解:

$2^3\times 5^1\times {\mathrm{1617251}}^1$

素因数の和:1617262

約数の個数: 16

約数和(自身を含む): 145552680

約数和(自身を除く): 80862640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1617251, 3234502, 6469004, 8086255, 12938008, 16172510, 32345020, 64690040]

約数ペア:

[(1, 64690040), (2, 32345020), (4, 16172510), (5, 12938008), (8, 8086255), (10, 6469004), (20, 3234502), (40, 1617251)]