19953520

素因数分解:

$2^4\times 5^1\times {\mathrm{249419}}^1$

素因数の和:249432

約数の個数: 20

約数和(自身を含む): 46392120

約数和(自身を除く): 26438600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249419, 498838, 997676, 1247095, 1995352, 2494190, 3990704, 4988380, 9976760, 19953520]

約数ペア:

[(1, 19953520), (2, 9976760), (4, 4988380), (5, 3990704), (8, 2494190), (10, 1995352), (16, 1247095), (20, 997676), (40, 498838), (80, 249419)]