28784720

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{3301}}^1$

素因数の和:3423

約数の個数: 40

約数和(自身を含む): 67558920

約数和(自身を除く): 38774200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 3301, 4360, 6602, 8720, 13204, 16505, 26408, 33010, 52816, 66020, 132040, 264080, 359809, 719618, 1439236, 1799045, 2878472, 3598090, 5756944, 7196180, 14392360, 28784720]

約数ペア:

[(1, 28784720), (2, 14392360), (4, 7196180), (5, 5756944), (8, 3598090), (10, 2878472), (16, 1799045), (20, 1439236), (40, 719618), (80, 359809), (109, 264080), (218, 132040), (436, 66020), (545, 52816), (872, 33010), (1090, 26408), (1744, 16505), (2180, 13204), (3301, 8720), (4360, 6602)]