21406587

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{421}}^1\times {\mathrm{997}}^1$

素因数の和:1438

約数の個数: 16

約数和(自身を含む): 30323232

約数和(自身を除く): 8916645

約数列:

[1, 3, 17, 51, 421, 997, 1263, 2991, 7157, 16949, 21471, 50847, 419737, 1259211, 7135529, 21406587]

約数ペア:

[(1, 21406587), (3, 7135529), (17, 1259211), (51, 419737), (421, 50847), (997, 21471), (1263, 16949), (2991, 7157)]