291213027

素因数分解:

$3^2\times 7^2\times {\mathrm{660347}}^1$

素因数の和:660367

約数の個数: 18

約数和(自身を含む): 489317868

約数和(自身を除く): 198104841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 660347, 1981041, 4622429, 5943123, 13867287, 32357003, 41601861, 97071009, 291213027]

約数ペア:

[(1, 291213027), (3, 97071009), (7, 41601861), (9, 32357003), (21, 13867287), (49, 5943123), (63, 4622429), (147, 1981041), (441, 660347)]