21151207

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{8861}}^1$

素因数の和:8910

約数の個数: 16

約数和(自身を含む): 27224064

約数和(自身を除く): 6072857

約数列:

[1, 7, 11, 31, 77, 217, 341, 2387, 8861, 62027, 97471, 274691, 682297, 1922837, 3021601, 21151207]

約数ペア:

[(1, 21151207), (7, 3021601), (11, 1922837), (31, 682297), (77, 274691), (217, 97471), (341, 62027), (2387, 8861)]