12345991

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:271

約数の個数: 24

約数和(自身を含む): 15390000

約数和(自身を除く): 3044009

約数列:

[1, 7, 19, 49, 89, 133, 149, 623, 931, 1043, 1691, 2831, 4361, 7301, 11837, 13261, 19817, 82859, 92827, 138719, 251959, 649789, 1763713, 12345991]

約数ペア:

[(1, 12345991), (7, 1763713), (19, 649789), (49, 251959), (89, 138719), (133, 92827), (149, 82859), (623, 19817), (931, 13261), (1043, 11837), (1691, 7301), (2831, 4361)]