20016760

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4591}}^1$

素因数の和:4711

約数の個数: 32

約数和(自身を含む): 45460800

約数和(自身を除く): 25444040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4591, 9182, 18364, 22955, 36728, 45910, 91820, 183640, 500419, 1000838, 2001676, 2502095, 4003352, 5004190, 10008380, 20016760]

約数ペア:

[(1, 20016760), (2, 10008380), (4, 5004190), (5, 4003352), (8, 2502095), (10, 2001676), (20, 1000838), (40, 500419), (109, 183640), (218, 91820), (436, 45910), (545, 36728), (872, 22955), (1090, 18364), (2180, 9182), (4360, 4591)]