21149541

素因数分解:

$3^2\times 7^1\times {\mathrm{389}}^1\times {\mathrm{863}}^1$

素因数の和:1265

約数の個数: 24

約数和(自身を含む): 35043840

約数和(自身を除く): 13894299

約数列:

[1, 3, 7, 9, 21, 63, 389, 863, 1167, 2589, 2723, 3501, 6041, 7767, 8169, 18123, 24507, 54369, 335707, 1007121, 2349949, 3021363, 7049847, 21149541]

約数ペア:

[(1, 21149541), (3, 7049847), (7, 3021363), (9, 2349949), (21, 1007121), (63, 335707), (389, 54369), (863, 24507), (1167, 18123), (2589, 8169), (2723, 7767), (3501, 6041)]