21476871

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{347}}^1$

素因数の和:412

約数の個数: 36

約数和(自身を含む): 35024808

約数和(自身を除く): 13547937

約数列:

[1, 3, 9, 13, 23, 39, 69, 117, 207, 299, 347, 529, 897, 1041, 1587, 2691, 3123, 4511, 4761, 6877, 7981, 13533, 20631, 23943, 40599, 61893, 71829, 103753, 183563, 311259, 550689, 933777, 1652067, 2386319, 7158957, 21476871]

約数ペア:

[(1, 21476871), (3, 7158957), (9, 2386319), (13, 1652067), (23, 933777), (39, 550689), (69, 311259), (117, 183563), (207, 103753), (299, 71829), (347, 61893), (529, 40599), (897, 23943), (1041, 20631), (1587, 13533), (2691, 7981), (3123, 6877), (4511, 4761)]