18967940

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{6823}}^1$

素因数の和:6971

約数の個数: 24

約数和(自身を含む): 40125120

約数和(自身を除く): 21157180

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 6823, 13646, 27292, 34115, 68230, 136460, 948397, 1896794, 3793588, 4741985, 9483970, 18967940]

約数ペア:

[(1, 18967940), (2, 9483970), (4, 4741985), (5, 3793588), (10, 1896794), (20, 948397), (139, 136460), (278, 68230), (556, 34115), (695, 27292), (1390, 13646), (2780, 6823)]