21340555

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{1051}}^1$

素因数の和:1218

約数の個数: 16

約数和(自身を含む): 26661888

約数和(自身を除く): 5321333

約数列:

[1, 5, 31, 131, 155, 655, 1051, 4061, 5255, 20305, 32581, 137681, 162905, 688405, 4268111, 21340555]

約数ペア:

[(1, 21340555), (5, 4268111), (31, 688405), (131, 162905), (155, 137681), (655, 32581), (1051, 20305), (4061, 5255)]