4991980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{197}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 12108096

約数和(自身を除く): 7116116

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 197, 362, 394, 724, 788, 905, 985, 1267, 1379, 1810, 1970, 2534, 2758, 3620, 3940, 5068, 5516, 6335, 6895, 12670, 13790, 25340, 27580, 35657, 71314, 142628, 178285, 249599, 356570, 499198, 713140, 998396, 1247995, 2495990, 4991980]

約数ペア:

[(1, 4991980), (2, 2495990), (4, 1247995), (5, 998396), (7, 713140), (10, 499198), (14, 356570), (20, 249599), (28, 178285), (35, 142628), (70, 71314), (140, 35657), (181, 27580), (197, 25340), (362, 13790), (394, 12670), (724, 6895), (788, 6335), (905, 5516), (985, 5068), (1267, 3940), (1379, 3620), (1810, 2758), (1970, 2534)]