21639664

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{443}}^1$

素因数の和:565

約数の個数: 40

約数和(自身を含む): 43604352

約数和(自身を除く): 21964688

約数列:

[1, 2, 4, 8, 16, 43, 71, 86, 142, 172, 284, 344, 443, 568, 688, 886, 1136, 1772, 3053, 3544, 6106, 7088, 12212, 19049, 24424, 31453, 38098, 48848, 62906, 76196, 125812, 152392, 251624, 304784, 503248, 1352479, 2704958, 5409916, 10819832, 21639664]

約数ペア:

[(1, 21639664), (2, 10819832), (4, 5409916), (8, 2704958), (16, 1352479), (43, 503248), (71, 304784), (86, 251624), (142, 152392), (172, 125812), (284, 76196), (344, 62906), (443, 48848), (568, 38098), (688, 31453), (886, 24424), (1136, 19049), (1772, 12212), (3053, 7088), (3544, 6106)]