21215763

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{7079}}^1$

素因数の和:7128

約数の個数: 20

約数和(自身を含む): 32553840

約数和(自身を除く): 11338077

約数列:

[1, 3, 9, 27, 37, 81, 111, 333, 999, 2997, 7079, 21237, 63711, 191133, 261923, 573399, 785769, 2357307, 7071921, 21215763]

約数ペア:

[(1, 21215763), (3, 7071921), (9, 2357307), (27, 785769), (37, 573399), (81, 261923), (111, 191133), (333, 63711), (999, 21237), (2997, 7079)]