21202415

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{4129}}^1$

素因数の和:4226

約数の個数: 16

約数和(自身を含む): 27753600

約数和(自身を除く): 6551185

約数列:

[1, 5, 13, 65, 79, 395, 1027, 4129, 5135, 20645, 53677, 268385, 326191, 1630955, 4240483, 21202415]

約数ペア:

[(1, 21202415), (5, 4240483), (13, 1630955), (65, 326191), (79, 268385), (395, 53677), (1027, 20645), (4129, 5135)]