20282920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{677}}^1$

素因数の和:802

約数の個数: 64

約数和(自身を含む): 52721280

約数和(自身を除く): 32438360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 107, 140, 214, 280, 428, 535, 677, 749, 856, 1070, 1354, 1498, 2140, 2708, 2996, 3385, 3745, 4280, 4739, 5416, 5992, 6770, 7490, 9478, 13540, 14980, 18956, 23695, 27080, 29960, 37912, 47390, 72439, 94780, 144878, 189560, 289756, 362195, 507073, 579512, 724390, 1014146, 1448780, 2028292, 2535365, 2897560, 4056584, 5070730, 10141460, 20282920]

約数ペア:

[(1, 20282920), (2, 10141460), (4, 5070730), (5, 4056584), (7, 2897560), (8, 2535365), (10, 2028292), (14, 1448780), (20, 1014146), (28, 724390), (35, 579512), (40, 507073), (56, 362195), (70, 289756), (107, 189560), (140, 144878), (214, 94780), (280, 72439), (428, 47390), (535, 37912), (677, 29960), (749, 27080), (856, 23695), (1070, 18956), (1354, 14980), (1498, 13540), (2140, 9478), (2708, 7490), (2996, 6770), (3385, 5992), (3745, 5416), (4280, 4739)]