20564985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{281}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 40932864

約数和(自身を除く): 20367879

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 41, 51, 85, 105, 119, 123, 205, 255, 281, 287, 357, 595, 615, 697, 843, 861, 1405, 1435, 1785, 1967, 2091, 3485, 4215, 4305, 4777, 4879, 5901, 9835, 10455, 11521, 14331, 14637, 23885, 24395, 29505, 33439, 34563, 57605, 71655, 73185, 80647, 100317, 167195, 172815, 195857, 241941, 403235, 501585, 587571, 979285, 1209705, 1370999, 2937855, 4112997, 6854995, 20564985]

約数ペア:

[(1, 20564985), (3, 6854995), (5, 4112997), (7, 2937855), (15, 1370999), (17, 1209705), (21, 979285), (35, 587571), (41, 501585), (51, 403235), (85, 241941), (105, 195857), (119, 172815), (123, 167195), (205, 100317), (255, 80647), (281, 73185), (287, 71655), (357, 57605), (595, 34563), (615, 33439), (697, 29505), (843, 24395), (861, 23885), (1405, 14637), (1435, 14331), (1785, 11521), (1967, 10455), (2091, 9835), (3485, 5901), (4215, 4879), (4305, 4777)]