21903615

素因数分解:

$3^4\times 5^1\times {\mathrm{54083}}^1$

素因数の和:54100

約数の個数: 20

約数和(自身を含む): 39264984

約数和(自身を除く): 17361369

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 54083, 162249, 270415, 486747, 811245, 1460241, 2433735, 4380723, 7301205, 21903615]

約数ペア:

[(1, 21903615), (3, 7301205), (5, 4380723), (9, 2433735), (15, 1460241), (27, 811245), (45, 486747), (81, 270415), (135, 162249), (405, 54083)]