21356215

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{241}}^1\times {\mathrm{479}}^1$

素因数の和:762

約数の個数: 16

約数和(自身を含む): 26484480

約数和(自身を除く): 5128265

約数列:

[1, 5, 37, 185, 241, 479, 1205, 2395, 8917, 17723, 44585, 88615, 115439, 577195, 4271243, 21356215]

約数ペア:

[(1, 21356215), (5, 4271243), (37, 577195), (185, 115439), (241, 88615), (479, 44585), (1205, 17723), (2395, 8917)]