21388280

素因数分解:

$2^3\times 5^1\times {\mathrm{534707}}^1$

素因数の和:534718

約数の個数: 16

約数和(自身を含む): 48123720

約数和(自身を除く): 26735440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 534707, 1069414, 2138828, 2673535, 4277656, 5347070, 10694140, 21388280]

約数ペア:

[(1, 21388280), (2, 10694140), (4, 5347070), (5, 4277656), (8, 2673535), (10, 2138828), (20, 1069414), (40, 534707)]