21398410995

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2551987}}^1$

素因数の和:2552051

約数の個数: 32

約数和(自身を含む): 37728590592

約数和(自身を除く): 16330179597

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 195, 215, 559, 645, 1677, 2795, 8385, 2551987, 7655961, 12759935, 33175831, 38279805, 99527493, 109735441, 165879155, 329206323, 497637465, 548677205, 1426560733, 1646031615, 4279682199, 7132803665, 21398410995]

約数ペア:

[(1, 21398410995), (3, 7132803665), (5, 4279682199), (13, 1646031615), (15, 1426560733), (39, 548677205), (43, 497637465), (65, 329206323), (129, 165879155), (195, 109735441), (215, 99527493), (559, 38279805), (645, 33175831), (1677, 12759935), (2795, 7655961), (8385, 2551987)]