21990310

素因数分解:

$2^1\times 5^1\times {\mathrm{1201}}^1\times {\mathrm{1831}}^1$

素因数の和:3039

約数の個数: 16

約数和(自身を含む): 39637152

約数和(自身を除く): 17646842

約数列:

[1, 2, 5, 10, 1201, 1831, 2402, 3662, 6005, 9155, 12010, 18310, 2199031, 4398062, 10995155, 21990310]

約数ペア:

[(1, 21990310), (2, 10995155), (5, 4398062), (10, 2199031), (1201, 18310), (1831, 12010), (2402, 9155), (3662, 6005)]