21180649

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{2243}}^1$

素因数の和:2340

約数の個数: 16

約数和(自身を含む): 25850880

約数和(自身を除く): 4670231

約数列:

[1, 7, 19, 71, 133, 497, 1349, 2243, 9443, 15701, 42617, 159253, 298319, 1114771, 3025807, 21180649]

約数ペア:

[(1, 21180649), (7, 3025807), (19, 1114771), (71, 298319), (133, 159253), (497, 42617), (1349, 15701), (2243, 9443)]