21052239

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{281}}^1$

素因数の和:427

約数の個数: 32

約数和(自身を含む): 32405184

約数和(自身を除く): 11352945

約数列:

[1, 3, 13, 17, 39, 51, 113, 221, 281, 339, 663, 843, 1469, 1921, 3653, 4407, 4777, 5763, 10959, 14331, 24973, 31753, 62101, 74919, 95259, 186303, 412789, 539801, 1238367, 1619403, 7017413, 21052239]

約数ペア:

[(1, 21052239), (3, 7017413), (13, 1619403), (17, 1238367), (39, 539801), (51, 412789), (113, 186303), (221, 95259), (281, 74919), (339, 62101), (663, 31753), (843, 24973), (1469, 14331), (1921, 10959), (3653, 5763), (4407, 4777)]