20181865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{4421}}^1$

素因数の和:4520

約数の個数: 16

約数和(自身を含む): 26744256

約数和(自身を除く): 6562391

約数列:

[1, 5, 11, 55, 83, 415, 913, 4421, 4565, 22105, 48631, 243155, 366943, 1834715, 4036373, 20181865]

約数ペア:

[(1, 20181865), (5, 4036373), (11, 1834715), (55, 366943), (83, 243155), (415, 48631), (913, 22105), (4421, 4565)]