19620880

素因数分解:

$2^4\times 5^1\times {\mathrm{245261}}^1$

素因数の和:245274

約数の個数: 20

約数和(自身を含む): 45618732

約数和(自身を除く): 25997852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245261, 490522, 981044, 1226305, 1962088, 2452610, 3924176, 4905220, 9810440, 19620880]

約数ペア:

[(1, 19620880), (2, 9810440), (4, 4905220), (5, 3924176), (8, 2452610), (10, 1962088), (16, 1226305), (20, 981044), (40, 490522), (80, 245261)]