20457220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3109}}^1$

素因数の和:3172

約数の個数: 48

約数和(自身を含む): 50158080

約数和(自身を除く): 29700860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3109, 3290, 6218, 6580, 12436, 15545, 21763, 31090, 43526, 62180, 87052, 108815, 146123, 217630, 292246, 435260, 584492, 730615, 1022861, 1461230, 2045722, 2922460, 4091444, 5114305, 10228610, 20457220]

約数ペア:

[(1, 20457220), (2, 10228610), (4, 5114305), (5, 4091444), (7, 2922460), (10, 2045722), (14, 1461230), (20, 1022861), (28, 730615), (35, 584492), (47, 435260), (70, 292246), (94, 217630), (140, 146123), (188, 108815), (235, 87052), (329, 62180), (470, 43526), (658, 31090), (940, 21763), (1316, 15545), (1645, 12436), (3109, 6580), (3290, 6218)]