19725881

素因数分解:

$7^2\times {\mathrm{23}}^2\times {\mathrm{761}}^1$

素因数の和:821

約数の個数: 18

約数和(自身を含む): 24019002

約数和(自身を除く): 4293121

約数列:

[1, 7, 23, 49, 161, 529, 761, 1127, 3703, 5327, 17503, 25921, 37289, 122521, 402569, 857647, 2817983, 19725881]

約数ペア:

[(1, 19725881), (7, 2817983), (23, 857647), (49, 402569), (161, 122521), (529, 37289), (761, 25921), (1127, 17503), (3703, 5327)]