20405900

素因数分解:

$2^2\times 5^2\times {\mathrm{204059}}^1$

素因数の和:204073

約数の個数: 18

約数和(自身を含む): 44281020

約数和(自身を除く): 23875120

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 204059, 408118, 816236, 1020295, 2040590, 4081180, 5101475, 10202950, 20405900]

約数ペア:

[(1, 20405900), (2, 10202950), (4, 5101475), (5, 4081180), (10, 2040590), (20, 1020295), (25, 816236), (50, 408118), (100, 204059)]