21125223

素因数分解:

$3^2\times 7^2\times {\mathrm{47903}}^1$

素因数の和:47923

約数の個数: 18

約数和(自身を含む): 35496864

約数和(自身を除く): 14371641

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 47903, 143709, 335321, 431127, 1005963, 2347247, 3017889, 7041741, 21125223]

約数ペア:

[(1, 21125223), (3, 7041741), (7, 3017889), (9, 2347247), (21, 1005963), (49, 431127), (63, 335321), (147, 143709), (441, 47903)]