21945320

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3947}}^1$

素因数の和:4097

約数の個数: 32

約数和(自身を含む): 49744800

約数和(自身を除く): 27799480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3947, 5560, 7894, 15788, 19735, 31576, 39470, 78940, 157880, 548633, 1097266, 2194532, 2743165, 4389064, 5486330, 10972660, 21945320]

約数ペア:

[(1, 21945320), (2, 10972660), (4, 5486330), (5, 4389064), (8, 2743165), (10, 2194532), (20, 1097266), (40, 548633), (139, 157880), (278, 78940), (556, 39470), (695, 31576), (1112, 19735), (1390, 15788), (2780, 7894), (3947, 5560)]