20980425

素因数分解:

$3^1\times 5^2\times {\mathrm{79}}^1\times {\mathrm{3541}}^1$

素因数の和:3633

約数の個数: 24

約数和(自身を含む): 35136640

約数和(自身を除く): 14156215

約数列:

[1, 3, 5, 15, 25, 75, 79, 237, 395, 1185, 1975, 3541, 5925, 10623, 17705, 53115, 88525, 265575, 279739, 839217, 1398695, 4196085, 6993475, 20980425]

約数ペア:

[(1, 20980425), (3, 6993475), (5, 4196085), (15, 1398695), (25, 839217), (75, 279739), (79, 265575), (237, 88525), (395, 53115), (1185, 17705), (1975, 10623), (3541, 5925)]