20851915

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{25903}}^1$

素因数の和:25938

約数の個数: 16

約数和(自身を含む): 29841408

約数和(自身を除く): 8989493

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 25903, 129515, 181321, 595769, 906605, 2978845, 4170383, 20851915]

約数ペア:

[(1, 20851915), (5, 4170383), (7, 2978845), (23, 906605), (35, 595769), (115, 181321), (161, 129515), (805, 25903)]