21452915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{193}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 29500416

約数和(自身を除く): 8047501

約数列:

[1, 5, 11, 43, 47, 55, 193, 215, 235, 473, 517, 965, 2021, 2123, 2365, 2585, 8299, 9071, 10105, 10615, 22231, 41495, 45355, 91289, 99781, 111155, 390053, 456445, 498905, 1950265, 4290583, 21452915]

約数ペア:

[(1, 21452915), (5, 4290583), (11, 1950265), (43, 498905), (47, 456445), (55, 390053), (193, 111155), (215, 99781), (235, 91289), (473, 45355), (517, 41495), (965, 22231), (2021, 10615), (2123, 10105), (2365, 9071), (2585, 8299)]