19776965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^2\times {\mathrm{181}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 26341224

約数和(自身を除く): 6564259

約数列:

[1, 5, 13, 41, 65, 181, 205, 533, 905, 1681, 2353, 2665, 7421, 8405, 11765, 21853, 37105, 96473, 109265, 304261, 482365, 1521305, 3955393, 19776965]

約数ペア:

[(1, 19776965), (5, 3955393), (13, 1521305), (41, 482365), (65, 304261), (181, 109265), (205, 96473), (533, 37105), (905, 21853), (1681, 11765), (2353, 8405), (2665, 7421)]