19871621

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1\times {\mathrm{613}}^1$

素因数の和:1052

約数の個数: 16

約数和(自身を含む): 24874368

約数和(自身を除く): 5002747

約数列:

[1, 7, 11, 77, 421, 613, 2947, 4291, 4631, 6743, 32417, 47201, 258073, 1806511, 2838803, 19871621]

約数ペア:

[(1, 19871621), (7, 2838803), (11, 1806511), (77, 258073), (421, 47201), (613, 32417), (2947, 6743), (4291, 4631)]