78980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{359}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 181440

約数和(自身を除く): 102460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 359, 718, 1436, 1795, 3590, 3949, 7180, 7898, 15796, 19745, 39490, 78980]

約数ペア:

[(1, 78980), (2, 39490), (4, 19745), (5, 15796), (10, 7898), (11, 7180), (20, 3949), (22, 3590), (44, 1795), (55, 1436), (110, 718), (220, 359)]