21968405

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{173}}^1\times {\mathrm{233}}^1$

素因数の和:520

約数の個数: 16

約数和(自身を含む): 26872560

約数和(自身を除く): 4904155

約数列:

[1, 5, 109, 173, 233, 545, 865, 1165, 18857, 25397, 40309, 94285, 126985, 201545, 4393681, 21968405]

約数ペア:

[(1, 21968405), (5, 4393681), (109, 201545), (173, 126985), (233, 94285), (545, 40309), (865, 25397), (1165, 18857)]