21115870

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{557}}^1$

素因数の和:804

約数の個数: 32

約数和(自身を含む): 40497408

約数和(自身を除く): 19381538

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 223, 446, 557, 1114, 1115, 2230, 2785, 3791, 5570, 7582, 9469, 18938, 18955, 37910, 47345, 94690, 124211, 248422, 621055, 1242110, 2111587, 4223174, 10557935, 21115870]

約数ペア:

[(1, 21115870), (2, 10557935), (5, 4223174), (10, 2111587), (17, 1242110), (34, 621055), (85, 248422), (170, 124211), (223, 94690), (446, 47345), (557, 37910), (1114, 18955), (1115, 18938), (2230, 9469), (2785, 7582), (3791, 5570)]