21279105

素因数分解:

$3^4\times 5^1\times {\mathrm{52541}}^1$

素因数の和:52558

約数の個数: 20

約数和(自身を含む): 38145492

約数和(自身を除く): 16866387

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52541, 157623, 262705, 472869, 788115, 1418607, 2364345, 4255821, 7093035, 21279105]

約数ペア:

[(1, 21279105), (3, 7093035), (5, 4255821), (9, 2364345), (15, 1418607), (27, 788115), (45, 472869), (81, 262705), (135, 157623), (405, 52541)]