20505723

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:907

約数の個数: 32

約数和(自身を含む): 33592320

約数和(自身を除く): 13086597

約数列:

[1, 3, 7, 17, 21, 51, 71, 119, 213, 357, 497, 809, 1207, 1491, 2427, 3621, 5663, 8449, 13753, 16989, 25347, 41259, 57439, 96271, 172317, 288813, 402073, 976463, 1206219, 2929389, 6835241, 20505723]

約数ペア:

[(1, 20505723), (3, 6835241), (7, 2929389), (17, 1206219), (21, 976463), (51, 402073), (71, 288813), (119, 172317), (213, 96271), (357, 57439), (497, 41259), (809, 25347), (1207, 16989), (1491, 13753), (2427, 8449), (3621, 5663)]