20572580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6389}}^1$

素因数の和:6428

約数の個数: 48

約数和(自身を含む): 51528960

約数和(自身を除く): 30956380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6389, 12778, 25556, 31945, 44723, 63890, 89446, 127780, 146947, 178892, 223615, 293894, 447230, 587788, 734735, 894460, 1028629, 1469470, 2057258, 2938940, 4114516, 5143145, 10286290, 20572580]

約数ペア:

[(1, 20572580), (2, 10286290), (4, 5143145), (5, 4114516), (7, 2938940), (10, 2057258), (14, 1469470), (20, 1028629), (23, 894460), (28, 734735), (35, 587788), (46, 447230), (70, 293894), (92, 223615), (115, 178892), (140, 146947), (161, 127780), (230, 89446), (322, 63890), (460, 44723), (644, 31945), (805, 25556), (1610, 12778), (3220, 6389)]