28784140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{18691}}^1$

素因数の和:18718

約数の個数: 48

約数和(自身を含む): 75366144

約数和(自身を除く): 46582004

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 18691, 37382, 74764, 93455, 130837, 186910, 205601, 261674, 373820, 411202, 523348, 654185, 822404, 1028005, 1308370, 1439207, 2056010, 2616740, 2878414, 4112020, 5756828, 7196035, 14392070, 28784140]

約数ペア:

[(1, 28784140), (2, 14392070), (4, 7196035), (5, 5756828), (7, 4112020), (10, 2878414), (11, 2616740), (14, 2056010), (20, 1439207), (22, 1308370), (28, 1028005), (35, 822404), (44, 654185), (55, 523348), (70, 411202), (77, 373820), (110, 261674), (140, 205601), (154, 186910), (220, 130837), (308, 93455), (385, 74764), (770, 37382), (1540, 18691)]