20742565

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1\times {\mathrm{821}}^1$

素因数の和:1020

約数の個数: 16

約数和(自身を含む): 25883136

約数和(自身を除く): 5140571

約数列:

[1, 5, 31, 155, 163, 815, 821, 4105, 5053, 25265, 25451, 127255, 133823, 669115, 4148513, 20742565]

約数ペア:

[(1, 20742565), (5, 4148513), (31, 669115), (155, 133823), (163, 127255), (815, 25451), (821, 25265), (4105, 5053)]