21980805

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19031}}^1$

素因数の和:19057

約数の個数: 32

約数和(自身を含む): 43849728

約数和(自身を除く): 21868923

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155, 19031, 57093, 95155, 133217, 209341, 285465, 399651, 628023, 666085, 1046705, 1465387, 1998255, 3140115, 4396161, 7326935, 21980805]

約数ペア:

[(1, 21980805), (3, 7326935), (5, 4396161), (7, 3140115), (11, 1998255), (15, 1465387), (21, 1046705), (33, 666085), (35, 628023), (55, 399651), (77, 285465), (105, 209341), (165, 133217), (231, 95155), (385, 57093), (1155, 19031)]