21432560

素因数分解:

$2^4\times 5^1\times {\mathrm{267907}}^1$

素因数の和:267920

約数の個数: 20

約数和(自身を含む): 49830888

約数和(自身を除く): 28398328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267907, 535814, 1071628, 1339535, 2143256, 2679070, 4286512, 5358140, 10716280, 21432560]

約数ペア:

[(1, 21432560), (2, 10716280), (4, 5358140), (5, 4286512), (8, 2679070), (10, 2143256), (16, 1339535), (20, 1071628), (40, 535814), (80, 267907)]