21439840

素因数分解:

$2^5\times 5^1\times {\mathrm{133999}}^1$

素因数の和:134014

約数の個数: 24

約数和(自身を含む): 50652000

約数和(自身を除く): 29212160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133999, 267998, 535996, 669995, 1071992, 1339990, 2143984, 2679980, 4287968, 5359960, 10719920, 21439840]

約数ペア:

[(1, 21439840), (2, 10719920), (4, 5359960), (5, 4287968), (8, 2679980), (10, 2143984), (16, 1339990), (20, 1071992), (32, 669995), (40, 535996), (80, 267998), (160, 133999)]