20547400

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1447}}^1$

素因数の和:1534

約数の個数: 48

約数和(自身を含む): 48479040

約数和(自身を除く): 27931640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1420, 1447, 1775, 2840, 2894, 3550, 5788, 7100, 7235, 11576, 14200, 14470, 28940, 36175, 57880, 72350, 102737, 144700, 205474, 289400, 410948, 513685, 821896, 1027370, 2054740, 2568425, 4109480, 5136850, 10273700, 20547400]

約数ペア:

[(1, 20547400), (2, 10273700), (4, 5136850), (5, 4109480), (8, 2568425), (10, 2054740), (20, 1027370), (25, 821896), (40, 513685), (50, 410948), (71, 289400), (100, 205474), (142, 144700), (200, 102737), (284, 72350), (355, 57880), (568, 36175), (710, 28940), (1420, 14470), (1447, 14200), (1775, 11576), (2840, 7235), (2894, 7100), (3550, 5788)]