21971007

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{7331}}^1$

素因数の和:7380

約数の個数: 20

約数和(自身を含む): 33712536

約数和(自身を除く): 11741529

約数列:

[1, 3, 9, 27, 37, 81, 111, 333, 999, 2997, 7331, 21993, 65979, 197937, 271247, 593811, 813741, 2441223, 7323669, 21971007]

約数ペア:

[(1, 21971007), (3, 7323669), (9, 2441223), (27, 813741), (37, 593811), (81, 271247), (111, 197937), (333, 65979), (999, 21993), (2997, 7331)]