397400

素因数分解:

$2^3\times 5^2\times {\mathrm{1987}}^1$

素因数の和:2003

約数の個数: 24

約数和(自身を含む): 924420

約数和(自身を除く): 527020

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 1987, 3974, 7948, 9935, 15896, 19870, 39740, 49675, 79480, 99350, 198700, 397400]

約数ペア:

[(1, 397400), (2, 198700), (4, 99350), (5, 79480), (8, 49675), (10, 39740), (20, 19870), (25, 15896), (40, 9935), (50, 7948), (100, 3974), (200, 1987)]