21811465

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{5501}}^1$

素因数の和:5580

約数の個数: 16

約数和(自身を含む): 28654416

約数和(自身を除く): 6842951

約数列:

[1, 5, 13, 61, 65, 305, 793, 3965, 5501, 27505, 71513, 335561, 357565, 1677805, 4362293, 21811465]

約数ペア:

[(1, 21811465), (5, 4362293), (13, 1677805), (61, 357565), (65, 335561), (305, 71513), (793, 27505), (3965, 5501)]