20688997

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{1423}}^1$

素因数の和:1528

約数の個数: 16

約数和(自身を含む): 24788992

約数和(自身を除く): 4099995

約数列:

[1, 7, 31, 67, 217, 469, 1423, 2077, 9961, 14539, 44113, 95341, 308791, 667387, 2955571, 20688997]

約数ペア:

[(1, 20688997), (7, 2955571), (31, 667387), (67, 308791), (217, 95341), (469, 44113), (1423, 14539), (2077, 9961)]