21640915

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{5417}}^1$

素因数の和:5486

約数の個数: 16

約数和(自身を含む): 28086912

約数和(自身を除く): 6445997

約数列:

[1, 5, 17, 47, 85, 235, 799, 3995, 5417, 27085, 92089, 254599, 460445, 1272995, 4328183, 21640915]

約数ペア:

[(1, 21640915), (5, 4328183), (17, 1272995), (47, 460445), (85, 254599), (235, 92089), (799, 27085), (3995, 5417)]