20500820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1087}}^1$

素因数の和:1160

約数の個数: 48

約数和(自身を含む): 46061568

約数和(自身を除く): 25560748

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 82, 92, 115, 164, 205, 230, 410, 460, 820, 943, 1087, 1886, 2174, 3772, 4348, 4715, 5435, 9430, 10870, 18860, 21740, 25001, 44567, 50002, 89134, 100004, 125005, 178268, 222835, 250010, 445670, 500020, 891340, 1025041, 2050082, 4100164, 5125205, 10250410, 20500820]

約数ペア:

[(1, 20500820), (2, 10250410), (4, 5125205), (5, 4100164), (10, 2050082), (20, 1025041), (23, 891340), (41, 500020), (46, 445670), (82, 250010), (92, 222835), (115, 178268), (164, 125005), (205, 100004), (230, 89134), (410, 50002), (460, 44567), (820, 25001), (943, 21740), (1087, 18860), (1886, 10870), (2174, 9430), (3772, 5435), (4348, 4715)]