20810860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{281}}^1$

素因数の和:343

約数の個数: 72

約数和(自身を含む): 52397856

約数和(自身を除く): 31586996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 281, 322, 460, 529, 562, 644, 805, 1058, 1124, 1405, 1610, 1967, 2116, 2645, 2810, 3220, 3703, 3934, 5290, 5620, 6463, 7406, 7868, 9835, 10580, 12926, 14812, 18515, 19670, 25852, 32315, 37030, 39340, 45241, 64630, 74060, 90482, 129260, 148649, 180964, 226205, 297298, 452410, 594596, 743245, 904820, 1040543, 1486490, 2081086, 2972980, 4162172, 5202715, 10405430, 20810860]

約数ペア:

[(1, 20810860), (2, 10405430), (4, 5202715), (5, 4162172), (7, 2972980), (10, 2081086), (14, 1486490), (20, 1040543), (23, 904820), (28, 743245), (35, 594596), (46, 452410), (70, 297298), (92, 226205), (115, 180964), (140, 148649), (161, 129260), (230, 90482), (281, 74060), (322, 64630), (460, 45241), (529, 39340), (562, 37030), (644, 32315), (805, 25852), (1058, 19670), (1124, 18515), (1405, 14812), (1610, 12926), (1967, 10580), (2116, 9835), (2645, 7868), (2810, 7406), (3220, 6463), (3703, 5620), (3934, 5290)]