20561884

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{10343}}^1$

素因数の和:10425

約数の個数: 24

約数和(自身を含む): 41707008

約数和(自身を除く): 21145124

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988, 10343, 20686, 41372, 72401, 144802, 289604, 734353, 1468706, 2937412, 5140471, 10280942, 20561884]

約数ペア:

[(1, 20561884), (2, 10280942), (4, 5140471), (7, 2937412), (14, 1468706), (28, 734353), (71, 289604), (142, 144802), (284, 72401), (497, 41372), (994, 20686), (1988, 10343)]