20450900

素因数分解:

$2^2\times 5^2\times {\mathrm{204509}}^1$

素因数の和:204523

約数の個数: 18

約数和(自身を含む): 44378670

約数和(自身を除く): 23927770

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 204509, 409018, 818036, 1022545, 2045090, 4090180, 5112725, 10225450, 20450900]

約数ペア:

[(1, 20450900), (2, 10225450), (4, 5112725), (5, 4090180), (10, 2045090), (20, 1022545), (25, 818036), (50, 409018), (100, 204509)]