20581561

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{709}}^1$

素因数の和:769

約数の個数: 32

約数和(自身を含む): 28627200

約数和(自身を除く): 8045639

約数列:

[1, 7, 11, 13, 29, 77, 91, 143, 203, 319, 377, 709, 1001, 2233, 2639, 4147, 4963, 7799, 9217, 20561, 29029, 54593, 64519, 101387, 143927, 226171, 267293, 709709, 1583197, 1871051, 2940223, 20581561]

約数ペア:

[(1, 20581561), (7, 2940223), (11, 1871051), (13, 1583197), (29, 709709), (77, 267293), (91, 226171), (143, 143927), (203, 101387), (319, 64519), (377, 54593), (709, 29029), (1001, 20561), (2233, 9217), (2639, 7799), (4147, 4963)]