217081720

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{115469}}^1$

素因数の和:115527

約数の個数: 32

約数和(自身を含む): 498830400

約数和(自身を除く): 281748680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 115469, 230938, 461876, 577345, 923752, 1154690, 2309380, 4618760, 5427043, 10854086, 21708172, 27135215, 43416344, 54270430, 108540860, 217081720]

約数ペア:

[(1, 217081720), (2, 108540860), (4, 54270430), (5, 43416344), (8, 27135215), (10, 21708172), (20, 10854086), (40, 5427043), (47, 4618760), (94, 2309380), (188, 1154690), (235, 923752), (376, 577345), (470, 461876), (940, 230938), (1880, 115469)]