21721890753

素因数分解:

$3^2\times {\mathrm{13513}}^1\times {\mathrm{178609}}^1$

素因数の和:192128

約数の個数: 12

約数和(自身を含む): 31378562020

約数和(自身を除く): 9656671267

約数列:

[1, 3, 9, 13513, 40539, 121617, 178609, 535827, 1607481, 2413543417, 7240630251, 21721890753]

約数ペア:

[(1, 21721890753), (3, 7240630251), (9, 2413543417), (13513, 1607481), (40539, 535827), (121617, 178609)]