20364280

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1637}}^1$

素因数の和:1959

約数の個数: 32

約数和(自身を含む): 45995040

約数和(自身を除く): 25630760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 1637, 2488, 3110, 3274, 6220, 6548, 8185, 12440, 13096, 16370, 32740, 65480, 509107, 1018214, 2036428, 2545535, 4072856, 5091070, 10182140, 20364280]

約数ペア:

[(1, 20364280), (2, 10182140), (4, 5091070), (5, 4072856), (8, 2545535), (10, 2036428), (20, 1018214), (40, 509107), (311, 65480), (622, 32740), (1244, 16370), (1555, 13096), (1637, 12440), (2488, 8185), (3110, 6548), (3274, 6220)]