21029515

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{607}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 28038528

約数和(自身を除く): 7009013

約数列:

[1, 5, 13, 41, 65, 169, 205, 533, 607, 845, 2665, 3035, 6929, 7891, 24887, 34645, 39455, 102583, 124435, 323531, 512915, 1617655, 4205903, 21029515]

約数ペア:

[(1, 21029515), (5, 4205903), (13, 1617655), (41, 512915), (65, 323531), (169, 124435), (205, 102583), (533, 39455), (607, 34645), (845, 24887), (2665, 7891), (3035, 6929)]