20805519021

素因数分解:

$3^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{1322749}}^1$

素因数の和:1322873

約数の個数: 24

約数和(自身を含む): 32571396000

約数和(自身を除く): 11765876979

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 749, 2247, 5243, 15729, 1322749, 3968247, 9259243, 27777729, 64814701, 141534143, 194444103, 424602429, 990739001, 2972217003, 6935173007, 20805519021]

約数ペア:

[(1, 20805519021), (3, 6935173007), (7, 2972217003), (21, 990739001), (49, 424602429), (107, 194444103), (147, 141534143), (321, 64814701), (749, 27777729), (2247, 9259243), (5243, 3968247), (15729, 1322749)]