21021740

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9643}}^1$

素因数の和:9761

約数の個数: 24

約数和(自身を含む): 44555280

約数和(自身を除く): 23533540

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9643, 19286, 38572, 48215, 96430, 192860, 1051087, 2102174, 4204348, 5255435, 10510870, 21021740]

約数ペア:

[(1, 21021740), (2, 10510870), (4, 5255435), (5, 4204348), (10, 2102174), (20, 1051087), (109, 192860), (218, 96430), (436, 48215), (545, 38572), (1090, 19286), (2180, 9643)]