20979021

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{52579}}^1$

素因数の和:52608

約数の個数: 16

約数和(自身を含む): 33651200

約数和(自身を除く): 12672179

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 52579, 157737, 368053, 999001, 1104159, 2997003, 6993007, 20979021]

約数ペア:

[(1, 20979021), (3, 6993007), (7, 2997003), (19, 1104159), (21, 999001), (57, 368053), (133, 157737), (399, 52579)]