28709020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{223}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 62431488

約数和(自身を除く): 33722468

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 157, 164, 205, 223, 314, 410, 446, 628, 785, 820, 892, 1115, 1570, 2230, 3140, 4460, 6437, 9143, 12874, 18286, 25748, 32185, 35011, 36572, 45715, 64370, 70022, 91430, 128740, 140044, 175055, 182860, 350110, 700220, 1435451, 2870902, 5741804, 7177255, 14354510, 28709020]

約数ペア:

[(1, 28709020), (2, 14354510), (4, 7177255), (5, 5741804), (10, 2870902), (20, 1435451), (41, 700220), (82, 350110), (157, 182860), (164, 175055), (205, 140044), (223, 128740), (314, 91430), (410, 70022), (446, 64370), (628, 45715), (785, 36572), (820, 35011), (892, 32185), (1115, 25748), (1570, 18286), (2230, 12874), (3140, 9143), (4460, 6437)]