21493917

素因数分解:

$3^4\times {\mathrm{443}}^1\times {\mathrm{599}}^1$

素因数の和:1054

約数の個数: 20

約数和(自身を含む): 32234400

約数和(自身を除く): 10740483

約数列:

[1, 3, 9, 27, 81, 443, 599, 1329, 1797, 3987, 5391, 11961, 16173, 35883, 48519, 265357, 796071, 2388213, 7164639, 21493917]

約数ペア:

[(1, 21493917), (3, 7164639), (9, 2388213), (27, 796071), (81, 265357), (443, 48519), (599, 35883), (1329, 16173), (1797, 11961), (3987, 5391)]