20988578

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{42487}}^1$

素因数の和:42521

約数の個数: 16

約数和(自身を含む): 35689920

約数和(自身を除く): 14701342

約数列:

[1, 2, 13, 19, 26, 38, 247, 494, 42487, 84974, 552331, 807253, 1104662, 1614506, 10494289, 20988578]

約数ペア:

[(1, 20988578), (2, 10494289), (13, 1614506), (19, 1104662), (26, 807253), (38, 552331), (247, 84974), (494, 42487)]