20397790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:373

約数の個数: 64

約数和(自身を含む): 45318528

約数和(自身を除く): 24920738

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 61, 70, 85, 119, 122, 170, 238, 281, 305, 427, 562, 595, 610, 854, 1037, 1190, 1405, 1967, 2074, 2135, 2810, 3934, 4270, 4777, 5185, 7259, 9554, 9835, 10370, 14518, 17141, 19670, 23885, 33439, 34282, 36295, 47770, 66878, 72590, 85705, 119987, 167195, 171410, 239974, 291397, 334390, 582794, 599935, 1199870, 1456985, 2039779, 2913970, 4079558, 10198895, 20397790]

約数ペア:

[(1, 20397790), (2, 10198895), (5, 4079558), (7, 2913970), (10, 2039779), (14, 1456985), (17, 1199870), (34, 599935), (35, 582794), (61, 334390), (70, 291397), (85, 239974), (119, 171410), (122, 167195), (170, 119987), (238, 85705), (281, 72590), (305, 66878), (427, 47770), (562, 36295), (595, 34282), (610, 33439), (854, 23885), (1037, 19670), (1190, 17141), (1405, 14518), (1967, 10370), (2074, 9835), (2135, 9554), (2810, 7259), (3934, 5185), (4270, 4777)]