20805759

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13679}}^1$

素因数の和:13711

約数の個数: 18

約数和(自身を含む): 32544720

約数和(自身を除く): 11738961

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13679, 41037, 123111, 177827, 533481, 1600443, 2311751, 6935253, 20805759]

約数ペア:

[(1, 20805759), (3, 6935253), (9, 2311751), (13, 1600443), (39, 533481), (117, 177827), (169, 123111), (507, 41037), (1521, 13679)]