21478405

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{5417}}^1$

素因数の和:5496

約数の個数: 16

約数和(自身を含む): 28216944

約数和(自身を除く): 6738539

約数列:

[1, 5, 13, 61, 65, 305, 793, 3965, 5417, 27085, 70421, 330437, 352105, 1652185, 4295681, 21478405]

約数ペア:

[(1, 21478405), (5, 4295681), (13, 1652185), (61, 352105), (65, 330437), (305, 70421), (793, 27085), (3965, 5417)]