20720791

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{2089}}^1$

素因数の和:2218

約数の個数: 16

約数和(自身を含む): 25748800

約数和(自身を除く): 5028009

約数列:

[1, 7, 13, 91, 109, 763, 1417, 2089, 9919, 14623, 27157, 190099, 227701, 1593907, 2960113, 20720791]

約数ペア:

[(1, 20720791), (7, 2960113), (13, 1593907), (91, 227701), (109, 190099), (763, 27157), (1417, 14623), (2089, 9919)]