21578710

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{52631}}^1$

素因数の和:52679

約数の個数: 16

約数和(自身を含む): 39789792

約数和(自身を除く): 18211082

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 52631, 105262, 263155, 526310, 2157871, 4315742, 10789355, 21578710]

約数ペア:

[(1, 21578710), (2, 10789355), (5, 4315742), (10, 2157871), (41, 526310), (82, 263155), (205, 105262), (410, 52631)]