20644925

素因数分解:

$5^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{887}}^1$

素因数の和:930

約数の個数: 36

約数和(自身を含む): 31381920

約数和(自身を除く): 10736995

約数列:

[1, 5, 7, 19, 25, 35, 49, 95, 133, 175, 245, 475, 665, 887, 931, 1225, 3325, 4435, 4655, 6209, 16853, 22175, 23275, 31045, 43463, 84265, 117971, 155225, 217315, 421325, 589855, 825797, 1086575, 2949275, 4128985, 20644925]

約数ペア:

[(1, 20644925), (5, 4128985), (7, 2949275), (19, 1086575), (25, 825797), (35, 589855), (49, 421325), (95, 217315), (133, 155225), (175, 117971), (245, 84265), (475, 43463), (665, 31045), (887, 23275), (931, 22175), (1225, 16853), (3325, 6209), (4435, 4655)]