643909370

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{159779}}^1$

素因数の和:159830

約数の個数: 32

約数和(自身を含む): 1288465920

約数和(自身を除く): 644556550

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 159779, 319558, 798895, 1597790, 2077127, 4154254, 4953149, 9906298, 10385635, 20771270, 24765745, 49531490, 64390937, 128781874, 321954685, 643909370]

約数ペア:

[(1, 643909370), (2, 321954685), (5, 128781874), (10, 64390937), (13, 49531490), (26, 24765745), (31, 20771270), (62, 10385635), (65, 9906298), (130, 4953149), (155, 4154254), (310, 2077127), (403, 1597790), (806, 798895), (2015, 319558), (4030, 159779)]