21354380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{347}}^1$

素因数の和:554

約数の個数: 48

約数和(自身を含む): 47882016

約数和(自身を除く): 26527636

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 181, 340, 347, 362, 694, 724, 905, 1388, 1735, 1810, 3077, 3470, 3620, 5899, 6154, 6940, 11798, 12308, 15385, 23596, 29495, 30770, 58990, 61540, 62807, 117980, 125614, 251228, 314035, 628070, 1067719, 1256140, 2135438, 4270876, 5338595, 10677190, 21354380]

約数ペア:

[(1, 21354380), (2, 10677190), (4, 5338595), (5, 4270876), (10, 2135438), (17, 1256140), (20, 1067719), (34, 628070), (68, 314035), (85, 251228), (170, 125614), (181, 117980), (340, 62807), (347, 61540), (362, 58990), (694, 30770), (724, 29495), (905, 23596), (1388, 15385), (1735, 12308), (1810, 11798), (3077, 6940), (3470, 6154), (3620, 5899)]