21188390

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51679}}^1$

素因数の和:51727

約数の個数: 16

約数和(自身を含む): 39070080

約数和(自身を除く): 17881690

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51679, 103358, 258395, 516790, 2118839, 4237678, 10594195, 21188390]

約数ペア:

[(1, 21188390), (2, 10594195), (5, 4237678), (10, 2118839), (41, 516790), (82, 258395), (205, 103358), (410, 51679)]