19992100

素因数分解:

$2^2\times 5^2\times {\mathrm{199921}}^1$

素因数の和:199935

約数の個数: 18

約数和(自身を含む): 43383074

約数和(自身を除く): 23390974

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199921, 399842, 799684, 999605, 1999210, 3998420, 4998025, 9996050, 19992100]

約数ペア:

[(1, 19992100), (2, 9996050), (4, 4998025), (5, 3998420), (10, 1999210), (20, 999605), (25, 799684), (50, 399842), (100, 199921)]