21756889

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{1511}}^1$

素因数の和:1557

約数の個数: 24

約数和(自身を含む): 28957824

約数和(自身を除く): 7200935

約数列:

[1, 7, 11, 17, 77, 119, 121, 187, 847, 1309, 1511, 2057, 10577, 14399, 16621, 25687, 116347, 179809, 182831, 282557, 1279817, 1977899, 3108127, 21756889]

約数ペア:

[(1, 21756889), (7, 3108127), (11, 1977899), (17, 1279817), (77, 282557), (119, 182831), (121, 179809), (187, 116347), (847, 25687), (1309, 16621), (1511, 14399), (2057, 10577)]