19997420

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{7873}}^1$

素因数の和:8009

約数の個数: 24

約数和(自身を含む): 42330624

約数和(自身を除く): 22333204

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 7873, 15746, 31492, 39365, 78730, 157460, 999871, 1999742, 3999484, 4999355, 9998710, 19997420]

約数ペア:

[(1, 19997420), (2, 9998710), (4, 4999355), (5, 3999484), (10, 1999742), (20, 999871), (127, 157460), (254, 78730), (508, 39365), (635, 31492), (1270, 15746), (2540, 7873)]