20729128

素因数分解:

$2^3\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1879}}^1$

素因数の和:2089

約数の個数: 32

約数和(自身を含む): 44668800

約数和(自身を除く): 23939672

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 197, 394, 788, 1379, 1576, 1879, 2758, 3758, 5516, 7516, 11032, 13153, 15032, 26306, 52612, 105224, 370163, 740326, 1480652, 2591141, 2961304, 5182282, 10364564, 20729128]

約数ペア:

[(1, 20729128), (2, 10364564), (4, 5182282), (7, 2961304), (8, 2591141), (14, 1480652), (28, 740326), (56, 370163), (197, 105224), (394, 52612), (788, 26306), (1379, 15032), (1576, 13153), (1879, 11032), (2758, 7516), (3758, 5516)]