21551480

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4943}}^1$

素因数の和:5063

約数の個数: 32

約数和(自身を含む): 48945600

約数和(自身を除く): 27394120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4943, 9886, 19772, 24715, 39544, 49430, 98860, 197720, 538787, 1077574, 2155148, 2693935, 4310296, 5387870, 10775740, 21551480]

約数ペア:

[(1, 21551480), (2, 10775740), (4, 5387870), (5, 4310296), (8, 2693935), (10, 2155148), (20, 1077574), (40, 538787), (109, 197720), (218, 98860), (436, 49430), (545, 39544), (872, 24715), (1090, 19772), (2180, 9886), (4360, 4943)]