21102980

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7591}}^1$

素因数の和:7739

約数の個数: 24

約数和(自身を含む): 44640960

約数和(自身を除く): 23537980

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7591, 15182, 30364, 37955, 75910, 151820, 1055149, 2110298, 4220596, 5275745, 10551490, 21102980]

約数ペア:

[(1, 21102980), (2, 10551490), (4, 5275745), (5, 4220596), (10, 2110298), (20, 1055149), (139, 151820), (278, 75910), (556, 37955), (695, 30364), (1390, 15182), (2780, 7591)]