19931440

素因数分解:

$2^4\times 5^1\times {\mathrm{249143}}^1$

素因数の和:249156

約数の個数: 20

約数和(自身を含む): 46340784

約数和(自身を除く): 26409344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249143, 498286, 996572, 1245715, 1993144, 2491430, 3986288, 4982860, 9965720, 19931440]

約数ペア:

[(1, 19931440), (2, 9965720), (4, 4982860), (5, 3986288), (8, 2491430), (10, 1993144), (16, 1245715), (20, 996572), (40, 498286), (80, 249143)]