21700445

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:513

約数の個数: 24

約数和(自身を含む): 28728072

約数和(自身を除く): 7027627

約数列:

[1, 5, 13, 61, 65, 169, 305, 421, 793, 845, 2105, 3965, 5473, 10309, 25681, 27365, 51545, 71149, 128405, 333853, 355745, 1669265, 4340089, 21700445]

約数ペア:

[(1, 21700445), (5, 4340089), (13, 1669265), (61, 355745), (65, 333853), (169, 128405), (305, 71149), (421, 51545), (793, 27365), (845, 25681), (2105, 10309), (3965, 5473)]