21295841

素因数分解:

$7^3\times {\mathrm{47}}^1\times {\mathrm{1321}}^1$

素因数の和:1389

約数の個数: 16

約数和(自身を含む): 25382400

約数和(自身を除く): 4086559

約数列:

[1, 7, 47, 49, 329, 343, 1321, 2303, 9247, 16121, 62087, 64729, 434609, 453103, 3042263, 21295841]

約数ペア:

[(1, 21295841), (7, 3042263), (47, 453103), (49, 434609), (329, 64729), (343, 62087), (1321, 16121), (2303, 9247)]