21640689

素因数分解:

$3^4\times 7^1\times {\mathrm{38167}}^1$

素因数の和:38186

約数の個数: 20

約数和(自身を含む): 36946624

約数和(自身を除く): 15305935

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 38167, 114501, 267169, 343503, 801507, 1030509, 2404521, 3091527, 7213563, 21640689]

約数ペア:

[(1, 21640689), (3, 7213563), (7, 3091527), (9, 2404521), (21, 1030509), (27, 801507), (63, 343503), (81, 267169), (189, 114501), (567, 38167)]