20500

素因数分解:

$2^2\times 5^3\times {\mathrm{41}}^1$

素因数の和:60

約数の個数: 24

約数和(自身を含む): 45864

約数和(自身を除く): 25364

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 125, 164, 205, 250, 410, 500, 820, 1025, 2050, 4100, 5125, 10250, 20500]

約数ペア:

[(1, 20500), (2, 10250), (4, 5125), (5, 4100), (10, 2050), (20, 1025), (25, 820), (41, 500), (50, 410), (82, 250), (100, 205), (125, 164)]