20656720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{36887}}^1$

素因数の和:36907

約数の個数: 40

約数和(自身を含む): 54889344

約数和(自身を除く): 34232624

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 36887, 73774, 147548, 184435, 258209, 295096, 368870, 516418, 590192, 737740, 1032836, 1291045, 1475480, 2065672, 2582090, 2950960, 4131344, 5164180, 10328360, 20656720]

約数ペア:

[(1, 20656720), (2, 10328360), (4, 5164180), (5, 4131344), (7, 2950960), (8, 2582090), (10, 2065672), (14, 1475480), (16, 1291045), (20, 1032836), (28, 737740), (35, 590192), (40, 516418), (56, 368870), (70, 295096), (80, 258209), (112, 184435), (140, 147548), (280, 73774), (560, 36887)]