21381711

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{181}}^1\times {\mathrm{233}}^1$

素因数の和:443

約数の個数: 24

約数和(自身を含む): 31174416

約数和(自身を除く): 9792705

約数列:

[1, 3, 13, 39, 169, 181, 233, 507, 543, 699, 2353, 3029, 7059, 9087, 30589, 39377, 42173, 91767, 118131, 126519, 548249, 1644747, 7127237, 21381711]

約数ペア:

[(1, 21381711), (3, 7127237), (13, 1644747), (39, 548249), (169, 126519), (181, 118131), (233, 91767), (507, 42173), (543, 39377), (699, 30589), (2353, 9087), (3029, 7059)]