20496140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{521}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 49460544

約数和(自身を除く): 28964404

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 281, 521, 562, 1042, 1124, 1405, 1967, 2084, 2605, 2810, 3647, 3934, 5210, 5620, 7294, 7868, 9835, 10420, 14588, 18235, 19670, 36470, 39340, 72940, 146401, 292802, 585604, 732005, 1024807, 1464010, 2049614, 2928020, 4099228, 5124035, 10248070, 20496140]

約数ペア:

[(1, 20496140), (2, 10248070), (4, 5124035), (5, 4099228), (7, 2928020), (10, 2049614), (14, 1464010), (20, 1024807), (28, 732005), (35, 585604), (70, 292802), (140, 146401), (281, 72940), (521, 39340), (562, 36470), (1042, 19670), (1124, 18235), (1405, 14588), (1967, 10420), (2084, 9835), (2605, 7868), (2810, 7294), (3647, 5620), (3934, 5210)]