81372781

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{701}}^1$

素因数の和:841

約数の個数: 24

約数和(自身を含む): 99874944

約数和(自身を除く): 18502163

約数列:

[1, 7, 23, 49, 103, 161, 701, 721, 1127, 2369, 4907, 5047, 16123, 16583, 34349, 72203, 112861, 116081, 505421, 790027, 1660669, 3537947, 11624683, 81372781]

約数ペア:

[(1, 81372781), (7, 11624683), (23, 3537947), (49, 1660669), (103, 790027), (161, 505421), (701, 116081), (721, 112861), (1127, 72203), (2369, 34349), (4907, 16583), (5047, 16123)]