20235640

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{971}}^1$

素因数の和:1503

約数の個数: 32

約数和(自身を含む): 45664560

約数和(自身を除く): 25428920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 971, 1042, 1942, 2084, 2605, 3884, 4168, 4855, 5210, 7768, 9710, 10420, 19420, 20840, 38840, 505891, 1011782, 2023564, 2529455, 4047128, 5058910, 10117820, 20235640]

約数ペア:

[(1, 20235640), (2, 10117820), (4, 5058910), (5, 4047128), (8, 2529455), (10, 2023564), (20, 1011782), (40, 505891), (521, 38840), (971, 20840), (1042, 19420), (1942, 10420), (2084, 9710), (2605, 7768), (3884, 5210), (4168, 4855)]