20651796740

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{401}}^1\times {\mathrm{28933}}^1$

素因数の和:29432

約数の個数: 48

約数和(自身を含む): 43966949040

約数和(自身を除く): 23315152300

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 401, 445, 802, 890, 1604, 1780, 2005, 4010, 8020, 28933, 35689, 57866, 71378, 115732, 142756, 144665, 178445, 289330, 356890, 578660, 713780, 2575037, 5150074, 10300148, 11602133, 12875185, 23204266, 25750370, 46408532, 51500740, 58010665, 116021330, 232042660, 1032589837, 2065179674, 4130359348, 5162949185, 10325898370, 20651796740]

約数ペア:

[(1, 20651796740), (2, 10325898370), (4, 5162949185), (5, 4130359348), (10, 2065179674), (20, 1032589837), (89, 232042660), (178, 116021330), (356, 58010665), (401, 51500740), (445, 46408532), (802, 25750370), (890, 23204266), (1604, 12875185), (1780, 11602133), (2005, 10300148), (4010, 5150074), (8020, 2575037), (28933, 713780), (35689, 578660), (57866, 356890), (71378, 289330), (115732, 178445), (142756, 144665)]