21331895

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{1069}}^1$

素因数の和:1394

約数の個数: 16

約数和(自身を含む): 27683040

約数和(自身を除く): 6351145

約数列:

[1, 5, 13, 65, 307, 1069, 1535, 3991, 5345, 13897, 19955, 69485, 328183, 1640915, 4266379, 21331895]

約数ペア:

[(1, 21331895), (5, 4266379), (13, 1640915), (65, 328183), (307, 69485), (1069, 19955), (1535, 13897), (3991, 5345)]