21253360

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1783}}^1$

素因数の和:1945

約数の個数: 40

約数和(自身を含む): 49773600

約数和(自身を除く): 28520240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1783, 2384, 2980, 3566, 5960, 7132, 8915, 11920, 14264, 17830, 28528, 35660, 71320, 142640, 265667, 531334, 1062668, 1328335, 2125336, 2656670, 4250672, 5313340, 10626680, 21253360]

約数ペア:

[(1, 21253360), (2, 10626680), (4, 5313340), (5, 4250672), (8, 2656670), (10, 2125336), (16, 1328335), (20, 1062668), (40, 531334), (80, 265667), (149, 142640), (298, 71320), (596, 35660), (745, 28528), (1192, 17830), (1490, 14264), (1783, 11920), (2384, 8915), (2980, 7132), (3566, 5960)]