21340990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{10211}}^1$

素因数の和:10248

約数の個数: 32

約数和(自身を含む): 44115840

約数和(自身を除く): 22774850

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 95, 110, 190, 209, 418, 1045, 2090, 10211, 20422, 51055, 102110, 112321, 194009, 224642, 388018, 561605, 970045, 1123210, 1940090, 2134099, 4268198, 10670495, 21340990]

約数ペア:

[(1, 21340990), (2, 10670495), (5, 4268198), (10, 2134099), (11, 1940090), (19, 1123210), (22, 970045), (38, 561605), (55, 388018), (95, 224642), (110, 194009), (190, 112321), (209, 102110), (418, 51055), (1045, 20422), (2090, 10211)]