20988231

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{4051}}^1$

素因数の和:4222

約数の個数: 16

約数和(自身を含む): 30730368

約数和(自身を除く): 9742137

約数列:

[1, 3, 11, 33, 157, 471, 1727, 4051, 5181, 12153, 44561, 133683, 636007, 1908021, 6996077, 20988231]

約数ペア:

[(1, 20988231), (3, 6996077), (11, 1908021), (33, 636007), (157, 133683), (471, 44561), (1727, 12153), (4051, 5181)]