19700660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1291}}^1$

素因数の和:1416

約数の個数: 48

約数和(自身を含む): 47752320

約数和(自身を除く): 28051660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1291, 1526, 2180, 2582, 3052, 3815, 5164, 6455, 7630, 9037, 12910, 15260, 18074, 25820, 36148, 45185, 90370, 140719, 180740, 281438, 562876, 703595, 985033, 1407190, 1970066, 2814380, 3940132, 4925165, 9850330, 19700660]

約数ペア:

[(1, 19700660), (2, 9850330), (4, 4925165), (5, 3940132), (7, 2814380), (10, 1970066), (14, 1407190), (20, 985033), (28, 703595), (35, 562876), (70, 281438), (109, 180740), (140, 140719), (218, 90370), (436, 45185), (545, 36148), (763, 25820), (1090, 18074), (1291, 15260), (1526, 12910), (2180, 9037), (2582, 7630), (3052, 6455), (3815, 5164)]