20702920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73939}}^1$

素因数の和:73957

約数の個数: 32

約数和(自身を含む): 53236800

約数和(自身を除く): 32533880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73939, 147878, 295756, 369695, 517573, 591512, 739390, 1035146, 1478780, 2070292, 2587865, 2957560, 4140584, 5175730, 10351460, 20702920]

約数ペア:

[(1, 20702920), (2, 10351460), (4, 5175730), (5, 4140584), (7, 2957560), (8, 2587865), (10, 2070292), (14, 1478780), (20, 1035146), (28, 739390), (35, 591512), (40, 517573), (56, 369695), (70, 295756), (140, 147878), (280, 73939)]