21090100

素因数分解:

$2^2\times 5^2\times {\mathrm{210901}}^1$

素因数の和:210915

約数の個数: 18

約数和(自身を含む): 45765734

約数和(自身を除く): 24675634

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 210901, 421802, 843604, 1054505, 2109010, 4218020, 5272525, 10545050, 21090100]

約数ペア:

[(1, 21090100), (2, 10545050), (4, 5272525), (5, 4218020), (10, 2109010), (20, 1054505), (25, 843604), (50, 421802), (100, 210901)]