21240040

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{23087}}^1$

素因数の和:23121

約数の個数: 32

約数和(自身を含む): 49870080

約数和(自身を除く): 28630040

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 23087, 46174, 92348, 115435, 184696, 230870, 461740, 531001, 923480, 1062002, 2124004, 2655005, 4248008, 5310010, 10620020, 21240040]

約数ペア:

[(1, 21240040), (2, 10620020), (4, 5310010), (5, 4248008), (8, 2655005), (10, 2124004), (20, 1062002), (23, 923480), (40, 531001), (46, 461740), (92, 230870), (115, 184696), (184, 115435), (230, 92348), (460, 46174), (920, 23087)]