9991989

素因数分解:

$3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{797}}^1$

素因数の和:1009

約数の個数: 24

約数和(自身を含む): 16598400

約数和(自身を除く): 6606411

約数列:

[1, 3, 7, 9, 21, 63, 199, 597, 797, 1393, 1791, 2391, 4179, 5579, 7173, 12537, 16737, 50211, 158603, 475809, 1110221, 1427427, 3330663, 9991989]

約数ペア:

[(1, 9991989), (3, 3330663), (7, 1427427), (9, 1110221), (21, 475809), (63, 158603), (199, 50211), (597, 16737), (797, 12537), (1393, 7173), (1791, 5579), (2391, 4179)]