20999825

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{10909}}^1$

素因数の和:10937

約数の個数: 24

約数和(自身を含む): 32468160

約数和(自身を除く): 11468335

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925, 10909, 54545, 76363, 119999, 272725, 381815, 599995, 839993, 1909075, 2999975, 4199965, 20999825]

約数ペア:

[(1, 20999825), (5, 4199965), (7, 2999975), (11, 1909075), (25, 839993), (35, 599995), (55, 381815), (77, 272725), (175, 119999), (275, 76363), (385, 54545), (1925, 10909)]