20807801

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{499}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 25992000

約数和(自身を除く): 5184199

約数列:

[1, 7, 23, 37, 49, 161, 259, 499, 851, 1127, 1813, 3493, 5957, 11477, 18463, 24451, 41699, 80339, 129241, 424649, 562373, 904687, 2972543, 20807801]

約数ペア:

[(1, 20807801), (7, 2972543), (23, 904687), (37, 562373), (49, 424649), (161, 129241), (259, 80339), (499, 41699), (851, 24451), (1127, 18463), (1813, 11477), (3493, 5957)]