19901975

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{283}}^1$

素因数の和:419

約数の個数: 24

約数和(自身を含む): 25883760

約数和(自身を除く): 5981785

約数列:

[1, 5, 25, 29, 97, 145, 283, 485, 725, 1415, 2425, 2813, 7075, 8207, 14065, 27451, 41035, 70325, 137255, 205175, 686275, 796079, 3980395, 19901975]

約数ペア:

[(1, 19901975), (5, 3980395), (25, 796079), (29, 686275), (97, 205175), (145, 137255), (283, 70325), (485, 41035), (725, 27451), (1415, 14065), (2425, 8207), (2813, 7075)]