20517485

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{409}}^1$

素因数の和:620

約数の個数: 16

約数和(自身を含む): 25190400

約数和(自身を除く): 4672915

約数列:

[1, 5, 79, 127, 395, 409, 635, 2045, 10033, 32311, 50165, 51943, 161555, 259715, 4103497, 20517485]

約数ペア:

[(1, 20517485), (5, 4103497), (79, 259715), (127, 161555), (395, 51943), (409, 50165), (635, 32311), (2045, 10033)]