21087740

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{2113}}^1$

素因数の和:2621

約数の個数: 24

約数和(自身を含む): 44394000

約数和(自身を除く): 23306260

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1996, 2113, 2495, 4226, 4990, 8452, 9980, 10565, 21130, 42260, 1054387, 2108774, 4217548, 5271935, 10543870, 21087740]

約数ペア:

[(1, 21087740), (2, 10543870), (4, 5271935), (5, 4217548), (10, 2108774), (20, 1054387), (499, 42260), (998, 21130), (1996, 10565), (2113, 9980), (2495, 8452), (4226, 4990)]