19911490

素因数分解:

$2^1\times 5^1\times {\mathrm{457}}^1\times {\mathrm{4357}}^1$

素因数の和:4821

約数の個数: 16

約数和(自身を含む): 35927352

約数和(自身を除く): 16015862

約数列:

[1, 2, 5, 10, 457, 914, 2285, 4357, 4570, 8714, 21785, 43570, 1991149, 3982298, 9955745, 19911490]

約数ペア:

[(1, 19911490), (2, 9955745), (5, 3982298), (10, 1991149), (457, 43570), (914, 21785), (2285, 8714), (4357, 4570)]