21187299

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53101}}^1$

素因数の和:53130

約数の個数: 16

約数和(自身を含む): 33985280

約数和(自身を除く): 12797981

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53101, 159303, 371707, 1008919, 1115121, 3026757, 7062433, 21187299]

約数ペア:

[(1, 21187299), (3, 7062433), (7, 3026757), (19, 1115121), (21, 1008919), (57, 371707), (133, 159303), (399, 53101)]