81819780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194809}}^1$

素因数の和:194828

約数の個数: 48

約数和(自身を含む): 261824640

約数和(自身を除く): 180004860

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 194809, 389618, 584427, 779236, 974045, 1168854, 1363663, 1948090, 2337708, 2727326, 2922135, 3896180, 4090989, 5454652, 5844270, 6818315, 8181978, 11688540, 13636630, 16363956, 20454945, 27273260, 40909890, 81819780]

約数ペア:

[(1, 81819780), (2, 40909890), (3, 27273260), (4, 20454945), (5, 16363956), (6, 13636630), (7, 11688540), (10, 8181978), (12, 6818315), (14, 5844270), (15, 5454652), (20, 4090989), (21, 3896180), (28, 2922135), (30, 2727326), (35, 2337708), (42, 1948090), (60, 1363663), (70, 1168854), (84, 974045), (105, 779236), (140, 584427), (210, 389618), (420, 194809)]