21682210

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{449}}^1$

素因数の和:906

約数の個数: 32

約数和(自身を含む): 42768000

約数和(自身を除く): 21085790

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 439, 449, 878, 898, 2195, 2245, 4390, 4490, 4829, 4939, 9658, 9878, 24145, 24695, 48290, 49390, 197111, 394222, 985555, 1971110, 2168221, 4336442, 10841105, 21682210]

約数ペア:

[(1, 21682210), (2, 10841105), (5, 4336442), (10, 2168221), (11, 1971110), (22, 985555), (55, 394222), (110, 197111), (439, 49390), (449, 48290), (878, 24695), (898, 24145), (2195, 9878), (2245, 9658), (4390, 4939), (4490, 4829)]