20356280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{72701}}^1$

素因数の和:72719

約数の個数: 32

約数和(自身を含む): 52345440

約数和(自身を除く): 31989160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 72701, 145402, 290804, 363505, 508907, 581608, 727010, 1017814, 1454020, 2035628, 2544535, 2908040, 4071256, 5089070, 10178140, 20356280]

約数ペア:

[(1, 20356280), (2, 10178140), (4, 5089070), (5, 4071256), (7, 2908040), (8, 2544535), (10, 2035628), (14, 1454020), (20, 1017814), (28, 727010), (35, 581608), (40, 508907), (56, 363505), (70, 290804), (140, 145402), (280, 72701)]