21381836

素因数分解:

$2^2\times 7^2\times {\mathrm{43}}^2\times {\mathrm{59}}^1$

素因数の和:163

約数の個数: 54

約数和(自身を含む): 45318420

約数和(自身を除く): 23936584

約数列:

[1, 2, 4, 7, 14, 28, 43, 49, 59, 86, 98, 118, 172, 196, 236, 301, 413, 602, 826, 1204, 1652, 1849, 2107, 2537, 2891, 3698, 4214, 5074, 5782, 7396, 8428, 10148, 11564, 12943, 17759, 25886, 35518, 51772, 71036, 90601, 109091, 124313, 181202, 218182, 248626, 362404, 436364, 497252, 763637, 1527274, 3054548, 5345459, 10690918, 21381836]

約数ペア:

[(1, 21381836), (2, 10690918), (4, 5345459), (7, 3054548), (14, 1527274), (28, 763637), (43, 497252), (49, 436364), (59, 362404), (86, 248626), (98, 218182), (118, 181202), (172, 124313), (196, 109091), (236, 90601), (301, 71036), (413, 51772), (602, 35518), (826, 25886), (1204, 17759), (1652, 12943), (1849, 11564), (2107, 10148), (2537, 8428), (2891, 7396), (3698, 5782), (4214, 5074)]