20398940

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21701}}^1$

素因数の和:21757

約数の個数: 24

約数和(自身を含む): 43751232

約数和(自身を除く): 23352292

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21701, 43402, 86804, 108505, 217010, 434020, 1019947, 2039894, 4079788, 5099735, 10199470, 20398940]

約数ペア:

[(1, 20398940), (2, 10199470), (4, 5099735), (5, 4079788), (10, 2039894), (20, 1019947), (47, 434020), (94, 217010), (188, 108505), (235, 86804), (470, 43402), (940, 21701)]