21984208

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{349}}^1$

素因数の和:515

約数の個数: 40

約数和(自身を含む): 44441600

約数和(自身を除く): 22457392

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 127, 248, 254, 349, 496, 508, 698, 1016, 1396, 2032, 2792, 3937, 5584, 7874, 10819, 15748, 21638, 31496, 43276, 44323, 62992, 86552, 88646, 173104, 177292, 354584, 709168, 1374013, 2748026, 5496052, 10992104, 21984208]

約数ペア:

[(1, 21984208), (2, 10992104), (4, 5496052), (8, 2748026), (16, 1374013), (31, 709168), (62, 354584), (124, 177292), (127, 173104), (248, 88646), (254, 86552), (349, 62992), (496, 44323), (508, 43276), (698, 31496), (1016, 21638), (1396, 15748), (2032, 10819), (2792, 7874), (3937, 5584)]