21053275

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:519

約数の個数: 24

約数和(自身を含む): 27453600

約数和(自身を除く): 6400325

約数列:

[1, 5, 25, 29, 71, 145, 355, 409, 725, 1775, 2045, 2059, 10225, 10295, 11861, 29039, 51475, 59305, 145195, 296525, 725975, 842131, 4210655, 21053275]

約数ペア:

[(1, 21053275), (5, 4210655), (25, 842131), (29, 725975), (71, 296525), (145, 145195), (355, 59305), (409, 51475), (725, 29039), (1775, 11861), (2045, 10295), (2059, 10225)]