397761020

素因数分解:

$2^2\times 5^1\times {\mathrm{1999}}^1\times {\mathrm{9949}}^1$

素因数の和:11957

約数の個数: 24

約数和(自身を含む): 835800000

約数和(自身を除く): 438038980

約数列:

[1, 2, 4, 5, 10, 20, 1999, 3998, 7996, 9949, 9995, 19898, 19990, 39796, 39980, 49745, 99490, 198980, 19888051, 39776102, 79552204, 99440255, 198880510, 397761020]

約数ペア:

[(1, 397761020), (2, 198880510), (4, 99440255), (5, 79552204), (10, 39776102), (20, 19888051), (1999, 198980), (3998, 99490), (7996, 49745), (9949, 39980), (9995, 39796), (19898, 19990)]