31137820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1129}}^1$

素因数の和:1342

約数の個数: 48

約数和(自身を含む): 75176640

約数和(自身を除く): 44038820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 788, 985, 1129, 1379, 1970, 2258, 2758, 3940, 4516, 5516, 5645, 6895, 7903, 11290, 13790, 15806, 22580, 27580, 31612, 39515, 79030, 158060, 222413, 444826, 889652, 1112065, 1556891, 2224130, 3113782, 4448260, 6227564, 7784455, 15568910, 31137820]

約数ペア:

[(1, 31137820), (2, 15568910), (4, 7784455), (5, 6227564), (7, 4448260), (10, 3113782), (14, 2224130), (20, 1556891), (28, 1112065), (35, 889652), (70, 444826), (140, 222413), (197, 158060), (394, 79030), (788, 39515), (985, 31612), (1129, 27580), (1379, 22580), (1970, 15806), (2258, 13790), (2758, 11290), (3940, 7903), (4516, 6895), (5516, 5645)]