20686520

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{5021}}^1$

素因数の和:5135

約数の個数: 32

約数和(自身を含む): 47005920

約数和(自身を除く): 26319400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 5021, 10042, 20084, 25105, 40168, 50210, 100420, 200840, 517163, 1034326, 2068652, 2585815, 4137304, 5171630, 10343260, 20686520]

約数ペア:

[(1, 20686520), (2, 10343260), (4, 5171630), (5, 4137304), (8, 2585815), (10, 2068652), (20, 1034326), (40, 517163), (103, 200840), (206, 100420), (412, 50210), (515, 40168), (824, 25105), (1030, 20084), (2060, 10042), (4120, 5021)]