20651000

素因数分解:

$2^3\times 5^3\times {\mathrm{107}}^1\times {\mathrm{193}}^1$

素因数の和:321

約数の個数: 64

約数和(自身を含む): 49027680

約数和(自身を除く): 28376680

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 125, 193, 200, 214, 250, 386, 428, 500, 535, 772, 856, 965, 1000, 1070, 1544, 1930, 2140, 2675, 3860, 4280, 4825, 5350, 7720, 9650, 10700, 13375, 19300, 20651, 21400, 24125, 26750, 38600, 41302, 48250, 53500, 82604, 96500, 103255, 107000, 165208, 193000, 206510, 413020, 516275, 826040, 1032550, 2065100, 2581375, 4130200, 5162750, 10325500, 20651000]

約数ペア:

[(1, 20651000), (2, 10325500), (4, 5162750), (5, 4130200), (8, 2581375), (10, 2065100), (20, 1032550), (25, 826040), (40, 516275), (50, 413020), (100, 206510), (107, 193000), (125, 165208), (193, 107000), (200, 103255), (214, 96500), (250, 82604), (386, 53500), (428, 48250), (500, 41302), (535, 38600), (772, 26750), (856, 24125), (965, 21400), (1000, 20651), (1070, 19300), (1544, 13375), (1930, 10700), (2140, 9650), (2675, 7720), (3860, 5350), (4280, 4825)]