21075237

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{3331}}^1$

素因数の和:3393

約数の個数: 24

約数和(自身を含む): 32920160

約数和(自身を除く): 11844923

約数列:

[1, 3, 9, 19, 37, 57, 111, 171, 333, 703, 2109, 3331, 6327, 9993, 29979, 63289, 123247, 189867, 369741, 569601, 1109223, 2341693, 7025079, 21075237]

約数ペア:

[(1, 21075237), (3, 7025079), (9, 2341693), (19, 1109223), (37, 569601), (57, 369741), (111, 189867), (171, 123247), (333, 63289), (703, 29979), (2109, 9993), (3331, 6327)]