21490161

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{3001}}^1$

素因数の和:3053

約数の個数: 32

約数和(自身を含む): 36888576

約数和(自身を除く): 15398415

約数列:

[1, 3, 7, 11, 21, 31, 33, 77, 93, 217, 231, 341, 651, 1023, 2387, 3001, 7161, 9003, 21007, 33011, 63021, 93031, 99033, 231077, 279093, 651217, 693231, 1023341, 1953651, 3070023, 7163387, 21490161]

約数ペア:

[(1, 21490161), (3, 7163387), (7, 3070023), (11, 1953651), (21, 1023341), (31, 693231), (33, 651217), (77, 279093), (93, 231077), (217, 99033), (231, 93031), (341, 63021), (651, 33011), (1023, 21007), (2387, 9003), (3001, 7161)]