20781384

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1549}}^1$

素因数の和:1614

約数の個数: 64

約数和(自身を含む): 57288000

約数和(自身を除く): 36506616

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 43, 52, 78, 86, 104, 129, 156, 172, 258, 312, 344, 516, 559, 1032, 1118, 1549, 1677, 2236, 3098, 3354, 4472, 4647, 6196, 6708, 9294, 12392, 13416, 18588, 20137, 37176, 40274, 60411, 66607, 80548, 120822, 133214, 161096, 199821, 241644, 266428, 399642, 483288, 532856, 799284, 865891, 1598568, 1731782, 2597673, 3463564, 5195346, 6927128, 10390692, 20781384]

約数ペア:

[(1, 20781384), (2, 10390692), (3, 6927128), (4, 5195346), (6, 3463564), (8, 2597673), (12, 1731782), (13, 1598568), (24, 865891), (26, 799284), (39, 532856), (43, 483288), (52, 399642), (78, 266428), (86, 241644), (104, 199821), (129, 161096), (156, 133214), (172, 120822), (258, 80548), (312, 66607), (344, 60411), (516, 40274), (559, 37176), (1032, 20137), (1118, 18588), (1549, 13416), (1677, 12392), (2236, 9294), (3098, 6708), (3354, 6196), (4472, 4647)]