21421885

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{1259}}^1$

素因数の和:1388

約数の個数: 16

約数和(自身を含む): 26671680

約数和(自身を除く): 5249795

約数列:

[1, 5, 41, 83, 205, 415, 1259, 3403, 6295, 17015, 51619, 104497, 258095, 522485, 4284377, 21421885]

約数ペア:

[(1, 21421885), (5, 4284377), (41, 522485), (83, 258095), (205, 104497), (415, 51619), (1259, 17015), (3403, 6295)]