20838550

素因数分解:

$2^1\times 5^2\times {\mathrm{409}}^1\times {\mathrm{1019}}^1$

素因数の和:1440

約数の個数: 24

約数和(自身を含む): 38892600

約数和(自身を除く): 18054050

約数列:

[1, 2, 5, 10, 25, 50, 409, 818, 1019, 2038, 2045, 4090, 5095, 10190, 10225, 20450, 25475, 50950, 416771, 833542, 2083855, 4167710, 10419275, 20838550]

約数ペア:

[(1, 20838550), (2, 10419275), (5, 4167710), (10, 2083855), (25, 833542), (50, 416771), (409, 50950), (818, 25475), (1019, 20450), (2038, 10225), (2045, 10190), (4090, 5095)]