20428688

素因数分解:

$2^4\times 7^2\times {\mathrm{71}}^1\times {\mathrm{367}}^1$

素因数の和:460

約数の個数: 60

約数和(自身を含む): 46818432

約数和(自身を除く): 26389744

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 71, 98, 112, 142, 196, 284, 367, 392, 497, 568, 734, 784, 994, 1136, 1468, 1988, 2569, 2936, 3479, 3976, 5138, 5872, 6958, 7952, 10276, 13916, 17983, 20552, 26057, 27832, 35966, 41104, 52114, 55664, 71932, 104228, 143864, 182399, 208456, 287728, 364798, 416912, 729596, 1276793, 1459192, 2553586, 2918384, 5107172, 10214344, 20428688]

約数ペア:

[(1, 20428688), (2, 10214344), (4, 5107172), (7, 2918384), (8, 2553586), (14, 1459192), (16, 1276793), (28, 729596), (49, 416912), (56, 364798), (71, 287728), (98, 208456), (112, 182399), (142, 143864), (196, 104228), (284, 71932), (367, 55664), (392, 52114), (497, 41104), (568, 35966), (734, 27832), (784, 26057), (994, 20552), (1136, 17983), (1468, 13916), (1988, 10276), (2569, 7952), (2936, 6958), (3479, 5872), (3976, 5138)]