20939205

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4243}}^1$

素因数の和:4305

約数の個数: 32

約数和(自身を含む): 39112704

約数和(自身を除く): 18173499

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4243, 4935, 12729, 21215, 29701, 63645, 89103, 148505, 199421, 445515, 598263, 997105, 1395947, 2991315, 4187841, 6979735, 20939205]

約数ペア:

[(1, 20939205), (3, 6979735), (5, 4187841), (7, 2991315), (15, 1395947), (21, 997105), (35, 598263), (47, 445515), (105, 199421), (141, 148505), (235, 89103), (329, 63645), (705, 29701), (987, 21215), (1645, 12729), (4243, 4935)]