21049005

素因数分解:

$3^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{8609}}^1$

素因数の和:8780

約数の個数: 16

約数和(自身を含む): 33888960

約数和(自身を除く): 12839955

約数列:

[1, 3, 5, 15, 163, 489, 815, 2445, 8609, 25827, 43045, 129135, 1403267, 4209801, 7016335, 21049005]

約数ペア:

[(1, 21049005), (3, 7016335), (5, 4209801), (15, 1403267), (163, 129135), (489, 43045), (815, 25827), (2445, 8609)]