388557

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:72

約数の個数: 28

約数和(自身を含む): 642684

約数和(自身を除く): 254127

約数列:

[1, 3, 9, 13, 27, 39, 41, 81, 117, 123, 243, 351, 369, 533, 729, 1053, 1107, 1599, 3159, 3321, 4797, 9477, 9963, 14391, 29889, 43173, 129519, 388557]

約数ペア:

[(1, 388557), (3, 129519), (9, 43173), (13, 29889), (27, 14391), (39, 9963), (41, 9477), (81, 4797), (117, 3321), (123, 3159), (243, 1599), (351, 1107), (369, 1053), (533, 729)]