20406215

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1\times {\mathrm{761}}^1$

素因数の和:970

約数の個数: 16

約数和(自身を含む): 25456896

約数和(自身を除く): 5050681

約数列:

[1, 5, 31, 155, 173, 761, 865, 3805, 5363, 23591, 26815, 117955, 131653, 658265, 4081243, 20406215]

約数ペア:

[(1, 20406215), (5, 4081243), (31, 658265), (155, 131653), (173, 117955), (761, 26815), (865, 23591), (3805, 5363)]