20491720

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1427}}^1$

素因数の和:1797

約数の個数: 32

約数和(自身を含む): 46267200

約数和(自身を除く): 25775480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1427, 1436, 1795, 2854, 2872, 3590, 5708, 7135, 7180, 11416, 14270, 14360, 28540, 57080, 512293, 1024586, 2049172, 2561465, 4098344, 5122930, 10245860, 20491720]

約数ペア:

[(1, 20491720), (2, 10245860), (4, 5122930), (5, 4098344), (8, 2561465), (10, 2049172), (20, 1024586), (40, 512293), (359, 57080), (718, 28540), (1427, 14360), (1436, 14270), (1795, 11416), (2854, 7180), (2872, 7135), (3590, 5708)]