21902480

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6367}}^1$

素因数の和:6423

約数の個数: 40

約数和(自身を含む): 52115712

約数和(自身を除く): 30213232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6367, 12734, 25468, 31835, 50936, 63670, 101872, 127340, 254680, 273781, 509360, 547562, 1095124, 1368905, 2190248, 2737810, 4380496, 5475620, 10951240, 21902480]

約数ペア:

[(1, 21902480), (2, 10951240), (4, 5475620), (5, 4380496), (8, 2737810), (10, 2190248), (16, 1368905), (20, 1095124), (40, 547562), (43, 509360), (80, 273781), (86, 254680), (172, 127340), (215, 101872), (344, 63670), (430, 50936), (688, 31835), (860, 25468), (1720, 12734), (3440, 6367)]