21995620

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64693}}^1$

素因数の和:64719

約数の個数: 24

約数和(自身を含む): 48908664

約数和(自身を除く): 26913044

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64693, 129386, 258772, 323465, 646930, 1099781, 1293860, 2199562, 4399124, 5498905, 10997810, 21995620]

約数ペア:

[(1, 21995620), (2, 10997810), (4, 5498905), (5, 4399124), (10, 2199562), (17, 1293860), (20, 1099781), (34, 646930), (68, 323465), (85, 258772), (170, 129386), (340, 64693)]