21303615

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1\times {\mathrm{211}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 35168256

約数和(自身を除く): 13864641

約数列:

[1, 3, 5, 15, 53, 127, 159, 211, 265, 381, 633, 635, 795, 1055, 1905, 3165, 6731, 11183, 20193, 26797, 33549, 33655, 55915, 80391, 100965, 133985, 167745, 401955, 1420241, 4260723, 7101205, 21303615]

約数ペア:

[(1, 21303615), (3, 7101205), (5, 4260723), (15, 1420241), (53, 401955), (127, 167745), (159, 133985), (211, 100965), (265, 80391), (381, 55915), (633, 33655), (635, 33549), (795, 26797), (1055, 20193), (1905, 11183), (3165, 6731)]