19855810

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{379}}^1$

素因数の和:443

約数の個数: 48

約数和(自身を含む): 40055040

約数和(自身を除く): 20199230

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 169, 310, 338, 379, 403, 758, 806, 845, 1690, 1895, 2015, 3790, 4030, 4927, 5239, 9854, 10478, 11749, 23498, 24635, 26195, 49270, 52390, 58745, 64051, 117490, 128102, 152737, 305474, 320255, 640510, 763685, 1527370, 1985581, 3971162, 9927905, 19855810]

約数ペア:

[(1, 19855810), (2, 9927905), (5, 3971162), (10, 1985581), (13, 1527370), (26, 763685), (31, 640510), (62, 320255), (65, 305474), (130, 152737), (155, 128102), (169, 117490), (310, 64051), (338, 58745), (379, 52390), (403, 49270), (758, 26195), (806, 24635), (845, 23498), (1690, 11749), (1895, 10478), (2015, 9854), (3790, 5239), (4030, 4927)]