21378237

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{269}}^1\times {\mathrm{449}}^1$

素因数の和:780

約数の個数: 16

約数和(自身を含む): 29160000

約数和(自身を除く): 7781763

約数列:

[1, 3, 59, 177, 269, 449, 807, 1347, 15871, 26491, 47613, 79473, 120781, 362343, 7126079, 21378237]

約数ペア:

[(1, 21378237), (3, 7126079), (59, 362343), (177, 120781), (269, 79473), (449, 47613), (807, 26491), (1347, 15871)]