21081995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{9349}}^1$

素因数の和:9406

約数の個数: 16

約数和(自身を含む): 28274400

約数和(自身を除く): 7192405

約数列:

[1, 5, 11, 41, 55, 205, 451, 2255, 9349, 46745, 102839, 383309, 514195, 1916545, 4216399, 21081995]

約数ペア:

[(1, 21081995), (5, 4216399), (11, 1916545), (41, 514195), (55, 383309), (205, 102839), (451, 46745), (2255, 9349)]