21005890203

素因数分解:

$3^1\times {\mathrm{53}}^2\times {\mathrm{157}}^1\times {\mathrm{15877}}^1$

素因数の和:16143

約数の個数: 24

約数和(自身を含む): 28729907248

約数和(自身を除く): 7724017045

約数列:

[1, 3, 53, 157, 159, 471, 2809, 8321, 8427, 15877, 24963, 47631, 441013, 841481, 1323039, 2492689, 2524443, 7478067, 44598493, 132112517, 133795479, 396337551, 7001963401, 21005890203]

約数ペア:

[(1, 21005890203), (3, 7001963401), (53, 396337551), (157, 133795479), (159, 132112517), (471, 44598493), (2809, 7478067), (8321, 2524443), (8427, 2492689), (15877, 1323039), (24963, 841481), (47631, 441013)]