28090180

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 61205760

約数和(自身を除く): 33115580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 89, 172, 178, 215, 356, 367, 430, 445, 734, 860, 890, 1468, 1780, 1835, 3670, 3827, 7340, 7654, 15308, 15781, 19135, 31562, 32663, 38270, 63124, 65326, 76540, 78905, 130652, 157810, 163315, 315620, 326630, 653260, 1404509, 2809018, 5618036, 7022545, 14045090, 28090180]

約数ペア:

[(1, 28090180), (2, 14045090), (4, 7022545), (5, 5618036), (10, 2809018), (20, 1404509), (43, 653260), (86, 326630), (89, 315620), (172, 163315), (178, 157810), (215, 130652), (356, 78905), (367, 76540), (430, 65326), (445, 63124), (734, 38270), (860, 32663), (890, 31562), (1468, 19135), (1780, 15781), (1835, 15308), (3670, 7654), (3827, 7340)]