21540025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{347}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 28998144

約数和(自身を除く): 7458119

約数列:

[1, 5, 13, 25, 65, 191, 325, 347, 955, 1735, 2483, 4511, 4775, 8675, 12415, 22555, 62075, 66277, 112775, 331385, 861601, 1656925, 4308005, 21540025]

約数ペア:

[(1, 21540025), (5, 4308005), (13, 1656925), (25, 861601), (65, 331385), (191, 112775), (325, 66277), (347, 62075), (955, 22555), (1735, 12415), (2483, 8675), (4511, 4775)]