21213927

素因数分解:

$3^3\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1049}}^1$

素因数の和:1172

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 15074073

約数列:

[1, 3, 7, 9, 21, 27, 63, 107, 189, 321, 749, 963, 1049, 2247, 2889, 3147, 6741, 7343, 9441, 20223, 22029, 28323, 66087, 112243, 198261, 336729, 785701, 1010187, 2357103, 3030561, 7071309, 21213927]

約数ペア:

[(1, 21213927), (3, 7071309), (7, 3030561), (9, 2357103), (21, 1010187), (27, 785701), (63, 336729), (107, 198261), (189, 112243), (321, 66087), (749, 28323), (963, 22029), (1049, 20223), (2247, 9441), (2889, 7343), (3147, 6741)]