28175320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16381}}^1$

素因数の和:16435

約数の個数: 32

約数和(自身を含む): 64872720

約数和(自身を除く): 36697400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 16381, 32762, 65524, 81905, 131048, 163810, 327620, 655240, 704383, 1408766, 2817532, 3521915, 5635064, 7043830, 14087660, 28175320]

約数ペア:

[(1, 28175320), (2, 14087660), (4, 7043830), (5, 5635064), (8, 3521915), (10, 2817532), (20, 1408766), (40, 704383), (43, 655240), (86, 327620), (172, 163810), (215, 131048), (344, 81905), (430, 65524), (860, 32762), (1720, 16381)]