21208929

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{32579}}^1$

素因数の和:32620

約数の個数: 16

約数和(自身を含む): 33361920

約数和(自身を除く): 12152991

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 32579, 97737, 228053, 684159, 1009949, 3029847, 7069643, 21208929]

約数ペア:

[(1, 21208929), (3, 7069643), (7, 3029847), (21, 1009949), (31, 684159), (93, 228053), (217, 97737), (651, 32579)]