217971

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:54

約数の個数: 28

約数和(自身を含む): 367248

約数和(自身を除く): 149277

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 117, 207, 243, 299, 351, 621, 729, 897, 1053, 1863, 2691, 3159, 5589, 8073, 9477, 16767, 24219, 72657, 217971]

約数ペア:

[(1, 217971), (3, 72657), (9, 24219), (13, 16767), (23, 9477), (27, 8073), (39, 5589), (69, 3159), (81, 2691), (117, 1863), (207, 1053), (243, 897), (299, 729), (351, 621)]