21221081

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{5147}}^1$

素因数の和:5204

約数の個数: 16

約数和(自身を含む): 26357760

約数和(自身を除く): 5136679

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 5147, 36029, 97793, 159557, 684551, 1116899, 3031583, 21221081]

約数ペア:

[(1, 21221081), (7, 3031583), (19, 1116899), (31, 684551), (133, 159557), (217, 97793), (589, 36029), (4123, 5147)]