21990816

素因数分解:

$2^5\times 3^2\times {\mathrm{29}}^1\times {\mathrm{2633}}^1$

素因数の和:2678

約数の個数: 72

約数和(自身を含む): 64717380

約数和(自身を除く): 42726564

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 29, 32, 36, 48, 58, 72, 87, 96, 116, 144, 174, 232, 261, 288, 348, 464, 522, 696, 928, 1044, 1392, 2088, 2633, 2784, 4176, 5266, 7899, 8352, 10532, 15798, 21064, 23697, 31596, 42128, 47394, 63192, 76357, 84256, 94788, 126384, 152714, 189576, 229071, 252768, 305428, 379152, 458142, 610856, 687213, 758304, 916284, 1221712, 1374426, 1832568, 2443424, 2748852, 3665136, 5497704, 7330272, 10995408, 21990816]

約数ペア:

[(1, 21990816), (2, 10995408), (3, 7330272), (4, 5497704), (6, 3665136), (8, 2748852), (9, 2443424), (12, 1832568), (16, 1374426), (18, 1221712), (24, 916284), (29, 758304), (32, 687213), (36, 610856), (48, 458142), (58, 379152), (72, 305428), (87, 252768), (96, 229071), (116, 189576), (144, 152714), (174, 126384), (232, 94788), (261, 84256), (288, 76357), (348, 63192), (464, 47394), (522, 42128), (696, 31596), (928, 23697), (1044, 21064), (1392, 15798), (2088, 10532), (2633, 8352), (2784, 7899), (4176, 5266)]