20388500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^2\times {\mathrm{337}}^1$

素因数の和:378

約数の個数: 72

約数和(自身を含む): 49089768

約数和(自身を除く): 28701268

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 121, 125, 220, 242, 250, 275, 337, 484, 500, 550, 605, 674, 1100, 1210, 1348, 1375, 1685, 2420, 2750, 3025, 3370, 3707, 5500, 6050, 6740, 7414, 8425, 12100, 14828, 15125, 16850, 18535, 30250, 33700, 37070, 40777, 42125, 60500, 74140, 81554, 84250, 92675, 163108, 168500, 185350, 203885, 370700, 407770, 463375, 815540, 926750, 1019425, 1853500, 2038850, 4077700, 5097125, 10194250, 20388500]

約数ペア:

[(1, 20388500), (2, 10194250), (4, 5097125), (5, 4077700), (10, 2038850), (11, 1853500), (20, 1019425), (22, 926750), (25, 815540), (44, 463375), (50, 407770), (55, 370700), (100, 203885), (110, 185350), (121, 168500), (125, 163108), (220, 92675), (242, 84250), (250, 81554), (275, 74140), (337, 60500), (484, 42125), (500, 40777), (550, 37070), (605, 33700), (674, 30250), (1100, 18535), (1210, 16850), (1348, 15125), (1375, 14828), (1685, 12100), (2420, 8425), (2750, 7414), (3025, 6740), (3370, 6050), (3707, 5500)]