19989489

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{443}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 29250720

約数和(自身を除く): 9261231

約数列:

[1, 3, 13, 39, 89, 169, 267, 443, 507, 1157, 1329, 3471, 5759, 15041, 17277, 39427, 45123, 74867, 118281, 224601, 512551, 1537653, 6663163, 19989489]

約数ペア:

[(1, 19989489), (3, 6663163), (13, 1537653), (39, 512551), (89, 224601), (169, 118281), (267, 74867), (443, 45123), (507, 39427), (1157, 17277), (1329, 15041), (3471, 5759)]