21116771

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:203

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 5010589

約数列:

[1, 13, 17, 19, 47, 107, 221, 247, 323, 611, 799, 893, 1391, 1819, 2033, 4199, 5029, 10387, 11609, 15181, 23647, 26429, 34561, 65377, 85493, 95551, 197353, 449293, 1111409, 1242163, 1624367, 21116771]

約数ペア:

[(1, 21116771), (13, 1624367), (17, 1242163), (19, 1111409), (47, 449293), (107, 197353), (221, 95551), (247, 85493), (323, 65377), (611, 34561), (799, 26429), (893, 23647), (1391, 15181), (1819, 11609), (2033, 10387), (4199, 5029)]