1991308839

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{20849}}^1$

素因数の和:20975

約数の個数: 32

約数和(自身を含む): 2989056000

約数和(自身を除く): 997747161

約数列:

[1, 3, 13, 31, 39, 79, 93, 237, 403, 1027, 1209, 2449, 3081, 7347, 20849, 31837, 62547, 95511, 271037, 646319, 813111, 1647071, 1938957, 4941213, 8402147, 21411923, 25206441, 51059201, 64235769, 153177603, 663769613, 1991308839]

約数ペア:

[(1, 1991308839), (3, 663769613), (13, 153177603), (31, 64235769), (39, 51059201), (79, 25206441), (93, 21411923), (237, 8402147), (403, 4941213), (1027, 1938957), (1209, 1647071), (2449, 813111), (3081, 646319), (7347, 271037), (20849, 95511), (31837, 62547)]