18970978

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:306

約数の個数: 32

約数和(自身を含む): 31752000

約数和(自身を除く): 12781022

約数列:

[1, 2, 13, 26, 59, 83, 118, 149, 166, 298, 767, 1079, 1534, 1937, 2158, 3874, 4897, 8791, 9794, 12367, 17582, 24734, 63661, 114283, 127322, 160771, 228566, 321542, 729653, 1459306, 9485489, 18970978]

約数ペア:

[(1, 18970978), (2, 9485489), (13, 1459306), (26, 729653), (59, 321542), (83, 228566), (118, 160771), (149, 127322), (166, 114283), (298, 63661), (767, 24734), (1079, 17582), (1534, 12367), (1937, 9794), (2158, 8791), (3874, 4897)]