31940881

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 40632320

約数和(自身を除く): 8691439

約数列:

[1, 7, 19, 31, 61, 127, 133, 217, 427, 589, 889, 1159, 1891, 2413, 3937, 4123, 7747, 8113, 13237, 16891, 27559, 35929, 54229, 74803, 147193, 240157, 251503, 523621, 1030351, 1681099, 4562983, 31940881]

約数ペア:

[(1, 31940881), (7, 4562983), (19, 1681099), (31, 1030351), (61, 523621), (127, 251503), (133, 240157), (217, 147193), (427, 74803), (589, 54229), (889, 35929), (1159, 27559), (1891, 16891), (2413, 13237), (3937, 8113), (4123, 7747)]