21111993

素因数分解:

$3^2\times 7^4\times {\mathrm{977}}^1$

素因数の和:1011

約数の個数: 30

約数和(自身を含む): 35611914

約数和(自身を除く): 14499921

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 977, 1029, 2401, 2931, 3087, 6839, 7203, 8793, 20517, 21609, 47873, 61551, 143619, 335111, 430857, 1005333, 2345777, 3015999, 7037331, 21111993]

約数ペア:

[(1, 21111993), (3, 7037331), (7, 3015999), (9, 2345777), (21, 1005333), (49, 430857), (63, 335111), (147, 143619), (343, 61551), (441, 47873), (977, 21609), (1029, 20517), (2401, 8793), (2931, 7203), (3087, 6839)]