21057260

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21487}}^1$

素因数の和:21510

約数の個数: 36

約数和(自身を含む): 51442272

約数和(自身を除く): 30385012

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21487, 42974, 85948, 107435, 150409, 214870, 300818, 429740, 601636, 752045, 1052863, 1504090, 2105726, 3008180, 4211452, 5264315, 10528630, 21057260]

約数ペア:

[(1, 21057260), (2, 10528630), (4, 5264315), (5, 4211452), (7, 3008180), (10, 2105726), (14, 1504090), (20, 1052863), (28, 752045), (35, 601636), (49, 429740), (70, 300818), (98, 214870), (140, 150409), (196, 107435), (245, 85948), (490, 42974), (980, 21487)]