21241647

素因数分解:

$3^2\times 7^4\times {\mathrm{983}}^1$

素因数の和:1017

約数の個数: 30

約数和(自身を含む): 35830392

約数和(自身を除く): 14588745

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 983, 1029, 2401, 2949, 3087, 6881, 7203, 8847, 20643, 21609, 48167, 61929, 144501, 337169, 433503, 1011507, 2360183, 3034521, 7080549, 21241647]

約数ペア:

[(1, 21241647), (3, 7080549), (7, 3034521), (9, 2360183), (21, 1011507), (49, 433503), (63, 337169), (147, 144501), (343, 61929), (441, 48167), (983, 21609), (1029, 20643), (2401, 8847), (2949, 7203), (3087, 6881)]