12990500

素因数分解:

$2^2\times 5^3\times {\mathrm{25981}}^1$

素因数の和:26000

約数の個数: 24

約数和(自身を含む): 28372344

約数和(自身を除く): 15381844

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 25981, 51962, 103924, 129905, 259810, 519620, 649525, 1299050, 2598100, 3247625, 6495250, 12990500]

約数ペア:

[(1, 12990500), (2, 6495250), (4, 3247625), (5, 2598100), (10, 1299050), (20, 649525), (25, 519620), (50, 259810), (100, 129905), (125, 103924), (250, 51962), (500, 25981)]