990100

素因数分解:

$2^2\times 5^2\times {\mathrm{9901}}^1$

素因数の和:9915

約数の個数: 18

約数和(自身を含む): 2148734

約数和(自身を除く): 1158634

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 9901, 19802, 39604, 49505, 99010, 198020, 247525, 495050, 990100]

約数ペア:

[(1, 990100), (2, 495050), (4, 247525), (5, 198020), (10, 99010), (20, 49505), (25, 39604), (50, 19802), (100, 9901)]