21972100

素因数分解:

$2^2\times 5^2\times {\mathrm{219721}}^1$

素因数の和:219735

約数の個数: 18

約数和(自身を含む): 47679674

約数和(自身を除く): 25707574

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 219721, 439442, 878884, 1098605, 2197210, 4394420, 5493025, 10986050, 21972100]

約数ペア:

[(1, 21972100), (2, 10986050), (4, 5493025), (5, 4394420), (10, 2197210), (20, 1098605), (25, 878884), (50, 439442), (100, 219721)]