20990690

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{1321}}^1$

素因数の和:1562

約数の個数: 32

約数和(自身を含む): 43403904

約数和(自身を除く): 22413214

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 227, 454, 1135, 1321, 1589, 2270, 2642, 3178, 6605, 7945, 9247, 13210, 15890, 18494, 46235, 92470, 299867, 599734, 1499335, 2099069, 2998670, 4198138, 10495345, 20990690]

約数ペア:

[(1, 20990690), (2, 10495345), (5, 4198138), (7, 2998670), (10, 2099069), (14, 1499335), (35, 599734), (70, 299867), (227, 92470), (454, 46235), (1135, 18494), (1321, 15890), (1589, 13210), (2270, 9247), (2642, 7945), (3178, 6605)]