21090419

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{349}}^1$

素因数の和:542

約数の個数: 16

約数和(自身を含む): 24696000

約数和(自身を除く): 3605581

約数列:

[1, 7, 89, 97, 349, 623, 679, 2443, 8633, 31061, 33853, 60431, 217427, 236971, 3012917, 21090419]

約数ペア:

[(1, 21090419), (7, 3012917), (89, 236971), (97, 217427), (349, 60431), (623, 33853), (679, 31061), (2443, 8633)]