20528620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{443}}^1$

素因数の和:790

約数の個数: 48

約数和(自身を含む): 49529088

約数和(自身を除く): 29000468

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 331, 443, 662, 886, 1324, 1655, 1772, 2215, 2317, 3101, 3310, 4430, 4634, 6202, 6620, 8860, 9268, 11585, 12404, 15505, 23170, 31010, 46340, 62020, 146633, 293266, 586532, 733165, 1026431, 1466330, 2052862, 2932660, 4105724, 5132155, 10264310, 20528620]

約数ペア:

[(1, 20528620), (2, 10264310), (4, 5132155), (5, 4105724), (7, 2932660), (10, 2052862), (14, 1466330), (20, 1026431), (28, 733165), (35, 586532), (70, 293266), (140, 146633), (331, 62020), (443, 46340), (662, 31010), (886, 23170), (1324, 15505), (1655, 12404), (1772, 11585), (2215, 9268), (2317, 8860), (3101, 6620), (3310, 6202), (4430, 4634)]