21276215

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{821}}^1$

素因数の和:970

約数の個数: 16

約数和(自身を含む): 26277696

約数和(自身を除く): 5001481

約数列:

[1, 5, 71, 73, 355, 365, 821, 4105, 5183, 25915, 58291, 59933, 291455, 299665, 4255243, 21276215]

約数ペア:

[(1, 21276215), (5, 4255243), (71, 299665), (73, 291455), (355, 59933), (365, 58291), (821, 25915), (4105, 5183)]