21912681

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54919}}^1$

素因数の和:54948

約数の個数: 16

約数和(自身を含む): 35148800

約数和(自身を除く): 13236119

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54919, 164757, 384433, 1043461, 1153299, 3130383, 7304227, 21912681]

約数ペア:

[(1, 21912681), (3, 7304227), (7, 3130383), (19, 1153299), (21, 1043461), (57, 384433), (133, 164757), (399, 54919)]