20523895

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4409}}^1$

素因数の和:4447

約数の個数: 24

約数和(自身を含む): 30164400

約数和(自身を除く): 9640505

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 665, 931, 4409, 4655, 22045, 30863, 83771, 154315, 216041, 418855, 586397, 1080205, 2931985, 4104779, 20523895]

約数ペア:

[(1, 20523895), (5, 4104779), (7, 2931985), (19, 1080205), (35, 586397), (49, 418855), (95, 216041), (133, 154315), (245, 83771), (665, 30863), (931, 22045), (4409, 4655)]