21005478

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{89767}}^1$

素因数の和:89788

約数の個数: 24

約数和(自身を含む): 49013328

約数和(自身を除く): 28007850

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234, 89767, 179534, 269301, 538602, 807903, 1166971, 1615806, 2333942, 3500913, 7001826, 10502739, 21005478]

約数ペア:

[(1, 21005478), (2, 10502739), (3, 7001826), (6, 3500913), (9, 2333942), (13, 1615806), (18, 1166971), (26, 807903), (39, 538602), (78, 269301), (117, 179534), (234, 89767)]