19892560

素因数分解:

$2^4\times 5^1\times {\mathrm{248657}}^1$

素因数の和:248670

約数の個数: 20

約数和(自身を含む): 46250388

約数和(自身を除く): 26357828

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248657, 497314, 994628, 1243285, 1989256, 2486570, 3978512, 4973140, 9946280, 19892560]

約数ペア:

[(1, 19892560), (2, 9946280), (4, 4973140), (5, 3978512), (8, 2486570), (10, 1989256), (16, 1243285), (20, 994628), (40, 497314), (80, 248657)]