21406515

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{727}}^1$

素因数の和:899

約数の個数: 32

約数和(自身を含む): 37180416

約数和(自身を除く): 15773901

約数列:

[1, 3, 5, 13, 15, 39, 65, 151, 195, 453, 727, 755, 1963, 2181, 2265, 3635, 5889, 9451, 9815, 10905, 28353, 29445, 47255, 109777, 141765, 329331, 548885, 1427101, 1646655, 4281303, 7135505, 21406515]

約数ペア:

[(1, 21406515), (3, 7135505), (5, 4281303), (13, 1646655), (15, 1427101), (39, 548885), (65, 329331), (151, 141765), (195, 109777), (453, 47255), (727, 29445), (755, 28353), (1963, 10905), (2181, 9815), (2265, 9451), (3635, 5889)]