28087120

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{3221}}^1$

素因数の和:3343

約数の個数: 40

約数和(自身を含む): 65922120

約数和(自身を除く): 37835000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 3221, 4360, 6442, 8720, 12884, 16105, 25768, 32210, 51536, 64420, 128840, 257680, 351089, 702178, 1404356, 1755445, 2808712, 3510890, 5617424, 7021780, 14043560, 28087120]

約数ペア:

[(1, 28087120), (2, 14043560), (4, 7021780), (5, 5617424), (8, 3510890), (10, 2808712), (16, 1755445), (20, 1404356), (40, 702178), (80, 351089), (109, 257680), (218, 128840), (436, 64420), (545, 51536), (872, 32210), (1090, 25768), (1744, 16105), (2180, 12884), (3221, 8720), (4360, 6442)]