9090100

素因数分解:

$2^2\times 5^2\times {\mathrm{90901}}^1$

素因数の和:90915

約数の個数: 18

約数和(自身を含む): 19725734

約数和(自身を除く): 10635634

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 90901, 181802, 363604, 454505, 909010, 1818020, 2272525, 4545050, 9090100]

約数ペア:

[(1, 9090100), (2, 4545050), (4, 2272525), (5, 1818020), (10, 909010), (20, 454505), (25, 363604), (50, 181802), (100, 90901)]