221319721

素因数分解:

$7^3\times {\mathrm{73}}^1\times {\mathrm{8839}}^1$

素因数の和:8933

約数の個数: 16

約数和(自身を含む): 261664000

約数和(自身を除く): 40344279

約数列:

[1, 7, 49, 73, 343, 511, 3577, 8839, 25039, 61873, 433111, 645247, 3031777, 4516729, 31617103, 221319721]

約数ペア:

[(1, 221319721), (7, 31617103), (49, 4516729), (73, 3031777), (343, 645247), (511, 433111), (3577, 61873), (8839, 25039)]