28778180

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:468

約数の個数: 48

約数和(自身を含む): 62610240

約数和(自身を除く): 33832060

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 109, 172, 215, 218, 307, 430, 436, 545, 614, 860, 1090, 1228, 1535, 2180, 3070, 4687, 6140, 9374, 13201, 18748, 23435, 26402, 33463, 46870, 52804, 66005, 66926, 93740, 132010, 133852, 167315, 264020, 334630, 669260, 1438909, 2877818, 5755636, 7194545, 14389090, 28778180]

約数ペア:

[(1, 28778180), (2, 14389090), (4, 7194545), (5, 5755636), (10, 2877818), (20, 1438909), (43, 669260), (86, 334630), (109, 264020), (172, 167315), (215, 133852), (218, 132010), (307, 93740), (430, 66926), (436, 66005), (545, 52804), (614, 46870), (860, 33463), (1090, 26402), (1228, 23435), (1535, 18748), (2180, 13201), (3070, 9374), (4687, 6140)]