21615755

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{2137}}^1$

素因数の和:2183

約数の個数: 24

約数和(自身を含む): 31505568

約数和(自身を除く): 9889813

約数列:

[1, 5, 7, 17, 35, 85, 119, 289, 595, 1445, 2023, 2137, 10115, 10685, 14959, 36329, 74795, 181645, 254303, 617593, 1271515, 3087965, 4323151, 21615755]

約数ペア:

[(1, 21615755), (5, 4323151), (7, 3087965), (17, 1271515), (35, 617593), (85, 254303), (119, 181645), (289, 74795), (595, 36329), (1445, 14959), (2023, 10685), (2137, 10115)]