21255280

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5653}}^1$

素因数の和:5713

約数の個数: 40

約数和(自身を含む): 50478912

約数和(自身を除く): 29223632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5653, 11306, 22612, 28265, 45224, 56530, 90448, 113060, 226120, 265691, 452240, 531382, 1062764, 1328455, 2125528, 2656910, 4251056, 5313820, 10627640, 21255280]

約数ペア:

[(1, 21255280), (2, 10627640), (4, 5313820), (5, 4251056), (8, 2656910), (10, 2125528), (16, 1328455), (20, 1062764), (40, 531382), (47, 452240), (80, 265691), (94, 226120), (188, 113060), (235, 90448), (376, 56530), (470, 45224), (752, 28265), (940, 22612), (1880, 11306), (3760, 5653)]