19842890

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{5101}}^1$

素因数の和:5497

約数の個数: 16

約数和(自身を含む): 35816040

約数和(自身を除く): 15973150

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 5101, 10202, 25505, 51010, 1984289, 3968578, 9921445, 19842890]

約数ペア:

[(1, 19842890), (2, 9921445), (5, 3968578), (10, 1984289), (389, 51010), (778, 25505), (1945, 10202), (3890, 5101)]