20490520

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1823}}^1$

素因数の和:2115

約数の個数: 32

約数和(自身を含む): 46293120

約数和(自身を除く): 25802600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1823, 2248, 2810, 3646, 5620, 7292, 9115, 11240, 14584, 18230, 36460, 72920, 512263, 1024526, 2049052, 2561315, 4098104, 5122630, 10245260, 20490520]

約数ペア:

[(1, 20490520), (2, 10245260), (4, 5122630), (5, 4098104), (8, 2561315), (10, 2049052), (20, 1024526), (40, 512263), (281, 72920), (562, 36460), (1124, 18230), (1405, 14584), (1823, 11240), (2248, 9115), (2810, 7292), (3646, 5620)]