18784025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1993}}^1$

素因数の和:2045

約数の個数: 24

約数和(自身を含む): 25961880

約数和(自身を除く): 7177855

約数列:

[1, 5, 13, 25, 29, 65, 145, 325, 377, 725, 1885, 1993, 9425, 9965, 25909, 49825, 57797, 129545, 288985, 647725, 751361, 1444925, 3756805, 18784025]

約数ペア:

[(1, 18784025), (5, 3756805), (13, 1444925), (25, 751361), (29, 647725), (65, 288985), (145, 129545), (325, 57797), (377, 49825), (725, 25909), (1885, 9965), (1993, 9425)]