21351392

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{263}}^1$

素因数の和:375

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 22557088

約数列:

[1, 2, 4, 8, 16, 32, 43, 59, 86, 118, 172, 236, 263, 344, 472, 526, 688, 944, 1052, 1376, 1888, 2104, 2537, 4208, 5074, 8416, 10148, 11309, 15517, 20296, 22618, 31034, 40592, 45236, 62068, 81184, 90472, 124136, 180944, 248272, 361888, 496544, 667231, 1334462, 2668924, 5337848, 10675696, 21351392]

約数ペア:

[(1, 21351392), (2, 10675696), (4, 5337848), (8, 2668924), (16, 1334462), (32, 667231), (43, 496544), (59, 361888), (86, 248272), (118, 180944), (172, 124136), (236, 90472), (263, 81184), (344, 62068), (472, 45236), (526, 40592), (688, 31034), (944, 22618), (1052, 20296), (1376, 15517), (1888, 11309), (2104, 10148), (2537, 8416), (4208, 5074)]