81645605

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{401}}^1\times {\mathrm{947}}^1$

素因数の和:1396

約数の個数: 16

約数和(自身を含む): 100609344

約数和(自身を除く): 18963739

約数列:

[1, 5, 43, 215, 401, 947, 2005, 4735, 17243, 40721, 86215, 203605, 379747, 1898735, 16329121, 81645605]

約数ペア:

[(1, 81645605), (5, 16329121), (43, 1898735), (215, 379747), (401, 203605), (947, 86215), (2005, 40721), (4735, 17243)]