51521740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{431}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 111767040

約数和(自身を除く): 60245300

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 139, 172, 215, 278, 430, 431, 556, 695, 860, 862, 1390, 1724, 2155, 2780, 4310, 5977, 8620, 11954, 18533, 23908, 29885, 37066, 59770, 59909, 74132, 92665, 119540, 119818, 185330, 239636, 299545, 370660, 599090, 1198180, 2576087, 5152174, 10304348, 12880435, 25760870, 51521740]

約数ペア:

[(1, 51521740), (2, 25760870), (4, 12880435), (5, 10304348), (10, 5152174), (20, 2576087), (43, 1198180), (86, 599090), (139, 370660), (172, 299545), (215, 239636), (278, 185330), (430, 119818), (431, 119540), (556, 92665), (695, 74132), (860, 59909), (862, 59770), (1390, 37066), (1724, 29885), (2155, 23908), (2780, 18533), (4310, 11954), (5977, 8620)]