1218405

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1889}}^1$

素因数の和:1940

約数の個数: 16

約数和(自身を含む): 1995840

約数和(自身を除く): 777435

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 1889, 5667, 9445, 28335, 81227, 243681, 406135, 1218405]

約数ペア:

[(1, 1218405), (3, 406135), (5, 243681), (15, 81227), (43, 28335), (129, 9445), (215, 5667), (645, 1889)]