21250256

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{461}}^1$

素因数の和:579

約数の個数: 40

約数和(自身を含む): 42851424

約数和(自身を除く): 21601168

約数列:

[1, 2, 4, 8, 16, 43, 67, 86, 134, 172, 268, 344, 461, 536, 688, 922, 1072, 1844, 2881, 3688, 5762, 7376, 11524, 19823, 23048, 30887, 39646, 46096, 61774, 79292, 123548, 158584, 247096, 317168, 494192, 1328141, 2656282, 5312564, 10625128, 21250256]

約数ペア:

[(1, 21250256), (2, 10625128), (4, 5312564), (8, 2656282), (16, 1328141), (43, 494192), (67, 317168), (86, 247096), (134, 158584), (172, 123548), (268, 79292), (344, 61774), (461, 46096), (536, 39646), (688, 30887), (922, 23048), (1072, 19823), (1844, 11524), (2881, 7376), (3688, 5762)]