20991888

素因数分解:

$2^4\times 3^2\times {\mathrm{145777}}^1$

素因数の和:145791

約数の個数: 30

約数和(自身を含む): 58748534

約数和(自身を除く): 37756646

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, 145777, 291554, 437331, 583108, 874662, 1166216, 1311993, 1749324, 2332432, 2623986, 3498648, 5247972, 6997296, 10495944, 20991888]

約数ペア:

[(1, 20991888), (2, 10495944), (3, 6997296), (4, 5247972), (6, 3498648), (8, 2623986), (9, 2332432), (12, 1749324), (16, 1311993), (18, 1166216), (24, 874662), (36, 583108), (48, 437331), (72, 291554), (144, 145777)]