21305523

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{2851}}^1$

素因数の和:2954

約数の個数: 16

約数和(自身を含む): 29569536

約数和(自身を除く): 8264013

約数列:

[1, 3, 47, 53, 141, 159, 2491, 2851, 7473, 8553, 133997, 151103, 401991, 453309, 7101841, 21305523]

約数ペア:

[(1, 21305523), (3, 7101841), (47, 453309), (53, 401991), (141, 151103), (159, 133997), (2491, 8553), (2851, 7473)]