18115480

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{991}}^1$

素因数の和:1459

約数の個数: 32

約数和(自身を含む): 40890240

約数和(自身を除く): 22774760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 991, 1828, 1982, 2285, 3656, 3964, 4570, 4955, 7928, 9140, 9910, 18280, 19820, 39640, 452887, 905774, 1811548, 2264435, 3623096, 4528870, 9057740, 18115480]

約数ペア:

[(1, 18115480), (2, 9057740), (4, 4528870), (5, 3623096), (8, 2264435), (10, 1811548), (20, 905774), (40, 452887), (457, 39640), (914, 19820), (991, 18280), (1828, 9910), (1982, 9140), (2285, 7928), (3656, 4955), (3964, 4570)]