21291595

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{4889}}^1$

素因数の和:4974

約数の個数: 16

約数和(自身を含む): 27931680

約数和(自身を除く): 6640085

約数列:

[1, 5, 13, 65, 67, 335, 871, 4355, 4889, 24445, 63557, 317785, 327563, 1637815, 4258319, 21291595]

約数ペア:

[(1, 21291595), (5, 4258319), (13, 1637815), (65, 327563), (67, 317785), (335, 63557), (871, 24445), (4355, 4889)]