21079539

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13859}}^1$

素因数の和:13891

約数の個数: 18

約数和(自身を含む): 32972940

約数和(自身を除く): 11893401

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13859, 41577, 124731, 180167, 540501, 1621503, 2342171, 7026513, 21079539]

約数ペア:

[(1, 21079539), (3, 7026513), (9, 2342171), (13, 1621503), (39, 540501), (117, 180167), (169, 124731), (507, 41577), (1521, 13859)]