19784540

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2543}}^1$

素因数の和:2941

約数の個数: 24

約数和(自身を含む): 41670720

約数和(自身を除く): 21886180

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2543, 3890, 5086, 7780, 10172, 12715, 25430, 50860, 989227, 1978454, 3956908, 4946135, 9892270, 19784540]

約数ペア:

[(1, 19784540), (2, 9892270), (4, 4946135), (5, 3956908), (10, 1978454), (20, 989227), (389, 50860), (778, 25430), (1556, 12715), (1945, 10172), (2543, 7780), (3890, 5086)]