20538895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10193}}^1$

素因数の和:10242

約数の個数: 16

約数和(自身を含む): 27401472

約数和(自身を除く): 6862577

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10193, 50965, 132509, 315983, 662545, 1579915, 4107779, 20538895]

約数ペア:

[(1, 20538895), (5, 4107779), (13, 1579915), (31, 662545), (65, 315983), (155, 132509), (403, 50965), (2015, 10193)]