21258555

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1433}}^1$

素因数の和:1507

約数の個数: 32

約数和(自身を含む): 36343296

約数和(自身を除く): 15084741

約数列:

[1, 3, 5, 15, 23, 43, 69, 115, 129, 215, 345, 645, 989, 1433, 2967, 4299, 4945, 7165, 14835, 21495, 32959, 61619, 98877, 164795, 184857, 308095, 494385, 924285, 1417237, 4251711, 7086185, 21258555]

約数ペア:

[(1, 21258555), (3, 7086185), (5, 4251711), (15, 1417237), (23, 924285), (43, 494385), (69, 308095), (115, 184857), (129, 164795), (215, 98877), (345, 61619), (645, 32959), (989, 21495), (1433, 14835), (2967, 7165), (4299, 4945)]