21321981

素因数分解:

$3^3\times {\mathrm{181}}^1\times {\mathrm{4363}}^1$

素因数の和:4553

約数の個数: 16

約数和(自身を含む): 31769920

約数和(自身を除く): 10447939

約数列:

[1, 3, 9, 27, 181, 543, 1629, 4363, 4887, 13089, 39267, 117801, 789703, 2369109, 7107327, 21321981]

約数ペア:

[(1, 21321981), (3, 7107327), (9, 2369109), (27, 789703), (181, 117801), (543, 39267), (1629, 13089), (4363, 4887)]