21206853

素因数分解:

$3^5\times {\mathrm{197}}^1\times {\mathrm{443}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 31999968

約数和(自身を除く): 10793115

約数列:

[1, 3, 9, 27, 81, 197, 243, 443, 591, 1329, 1773, 3987, 5319, 11961, 15957, 35883, 47871, 87271, 107649, 261813, 785439, 2356317, 7068951, 21206853]

約数ペア:

[(1, 21206853), (3, 7068951), (9, 2356317), (27, 785439), (81, 261813), (197, 107649), (243, 87271), (443, 47871), (591, 35883), (1329, 15957), (1773, 11961), (3987, 5319)]