21289728

素因数分解:

$2^8\times 3^1\times {\mathrm{19}}^1\times {\mathrm{1459}}^1$

素因数の和:1497

約数の個数: 72

約数和(自身を含む): 59684800

約数和(自身を除く): 38395072

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 19, 24, 32, 38, 48, 57, 64, 76, 96, 114, 128, 152, 192, 228, 256, 304, 384, 456, 608, 768, 912, 1216, 1459, 1824, 2432, 2918, 3648, 4377, 4864, 5836, 7296, 8754, 11672, 14592, 17508, 23344, 27721, 35016, 46688, 55442, 70032, 83163, 93376, 110884, 140064, 166326, 186752, 221768, 280128, 332652, 373504, 443536, 560256, 665304, 887072, 1120512, 1330608, 1774144, 2661216, 3548288, 5322432, 7096576, 10644864, 21289728]

約数ペア:

[(1, 21289728), (2, 10644864), (3, 7096576), (4, 5322432), (6, 3548288), (8, 2661216), (12, 1774144), (16, 1330608), (19, 1120512), (24, 887072), (32, 665304), (38, 560256), (48, 443536), (57, 373504), (64, 332652), (76, 280128), (96, 221768), (114, 186752), (128, 166326), (152, 140064), (192, 110884), (228, 93376), (256, 83163), (304, 70032), (384, 55442), (456, 46688), (608, 35016), (768, 27721), (912, 23344), (1216, 17508), (1459, 14592), (1824, 11672), (2432, 8754), (2918, 7296), (3648, 5836), (4377, 4864)]