21278646

素因数分解:

$2^1\times 3^3\times {\mathrm{394049}}^1$

素因数の和:394060

約数の個数: 16

約数和(自身を含む): 47286000

約数和(自身を除く): 26007354

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 394049, 788098, 1182147, 2364294, 3546441, 7092882, 10639323, 21278646]

約数ペア:

[(1, 21278646), (2, 10639323), (3, 7092882), (6, 3546441), (9, 2364294), (18, 1182147), (27, 788098), (54, 394049)]