21688015

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1\times {\mathrm{307}}^1$

素因数の和:582

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 4923185

約数列:

[1, 5, 71, 199, 307, 355, 995, 1535, 14129, 21797, 61093, 70645, 108985, 305465, 4337603, 21688015]

約数ペア:

[(1, 21688015), (5, 4337603), (71, 305465), (199, 108985), (307, 70645), (355, 61093), (995, 21797), (1535, 14129)]