21746420

素因数分解:

$2^2\times 5^1\times {\mathrm{499}}^1\times {\mathrm{2179}}^1$

素因数の和:2687

約数の個数: 24

約数和(自身を含む): 45780000

約数和(自身を除く): 24033580

約数列:

[1, 2, 4, 5, 10, 20, 499, 998, 1996, 2179, 2495, 4358, 4990, 8716, 9980, 10895, 21790, 43580, 1087321, 2174642, 4349284, 5436605, 10873210, 21746420]

約数ペア:

[(1, 21746420), (2, 10873210), (4, 5436605), (5, 4349284), (10, 2174642), (20, 1087321), (499, 43580), (998, 21790), (1996, 10895), (2179, 9980), (2495, 8716), (4358, 4990)]