21318723

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{181}}^1\times {\mathrm{569}}^1$

素因数の和:779

約数の個数: 24

約数和(自身を含む): 32366880

約数和(自身を除く): 11048157

約数列:

[1, 3, 9, 23, 69, 181, 207, 543, 569, 1629, 1707, 4163, 5121, 12489, 13087, 37467, 39261, 102989, 117783, 308967, 926901, 2368747, 7106241, 21318723]

約数ペア:

[(1, 21318723), (3, 7106241), (9, 2368747), (23, 926901), (69, 308967), (181, 117783), (207, 102989), (543, 39261), (569, 37467), (1629, 13087), (1707, 12489), (4163, 5121)]