21400856

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{1087}}^1$

素因数の和:1223

約数の個数: 32

約数和(自身を含む): 42301440

約数和(自身を除く): 20900584

約数列:

[1, 2, 4, 8, 23, 46, 92, 107, 184, 214, 428, 856, 1087, 2174, 2461, 4348, 4922, 8696, 9844, 19688, 25001, 50002, 100004, 116309, 200008, 232618, 465236, 930472, 2675107, 5350214, 10700428, 21400856]

約数ペア:

[(1, 21400856), (2, 10700428), (4, 5350214), (8, 2675107), (23, 930472), (46, 465236), (92, 232618), (107, 200008), (184, 116309), (214, 100004), (428, 50002), (856, 25001), (1087, 19688), (2174, 9844), (2461, 8696), (4348, 4922)]