20988464

素因数分解:

$2^4\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1409}}^1$

素因数の和:1450

約数の個数: 60

約数和(自身を含む): 49829400

約数和(自身を除く): 28840936

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 49, 56, 76, 98, 112, 133, 152, 196, 266, 304, 392, 532, 784, 931, 1064, 1409, 1862, 2128, 2818, 3724, 5636, 7448, 9863, 11272, 14896, 19726, 22544, 26771, 39452, 53542, 69041, 78904, 107084, 138082, 157808, 187397, 214168, 276164, 374794, 428336, 552328, 749588, 1104656, 1311779, 1499176, 2623558, 2998352, 5247116, 10494232, 20988464]

約数ペア:

[(1, 20988464), (2, 10494232), (4, 5247116), (7, 2998352), (8, 2623558), (14, 1499176), (16, 1311779), (19, 1104656), (28, 749588), (38, 552328), (49, 428336), (56, 374794), (76, 276164), (98, 214168), (112, 187397), (133, 157808), (152, 138082), (196, 107084), (266, 78904), (304, 69041), (392, 53542), (532, 39452), (784, 26771), (931, 22544), (1064, 19726), (1409, 14896), (1862, 11272), (2128, 9863), (2818, 7448), (3724, 5636)]