21215545

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{617}}^1$

素因数の和:681

約数の個数: 24

約数和(自身を含む): 28707336

約数和(自身を除く): 7491791

約数列:

[1, 5, 13, 23, 65, 115, 299, 529, 617, 1495, 2645, 3085, 6877, 8021, 14191, 34385, 40105, 70955, 184483, 326393, 922415, 1631965, 4243109, 21215545]

約数ペア:

[(1, 21215545), (5, 4243109), (13, 1631965), (23, 922415), (65, 326393), (115, 184483), (299, 70955), (529, 40105), (617, 34385), (1495, 14191), (2645, 8021), (3085, 6877)]