20668144

素因数分解:

$2^4\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1693}}^1$

素因数の和:1817

約数の個数: 40

約数和(自身を含む): 46212320

約数和(自身を除く): 25544176

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 109, 112, 218, 436, 763, 872, 1526, 1693, 1744, 3052, 3386, 6104, 6772, 11851, 12208, 13544, 23702, 27088, 47404, 94808, 184537, 189616, 369074, 738148, 1291759, 1476296, 2583518, 2952592, 5167036, 10334072, 20668144]

約数ペア:

[(1, 20668144), (2, 10334072), (4, 5167036), (7, 2952592), (8, 2583518), (14, 1476296), (16, 1291759), (28, 738148), (56, 369074), (109, 189616), (112, 184537), (218, 94808), (436, 47404), (763, 27088), (872, 23702), (1526, 13544), (1693, 12208), (1744, 11851), (3052, 6772), (3386, 6104)]