21501376

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:669

約数の個数: 56

約数和(自身を含む): 47095664

約数和(自身を除く): 25594288

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 64, 86, 104, 172, 208, 344, 416, 559, 601, 688, 832, 1118, 1202, 1376, 2236, 2404, 2752, 4472, 4808, 7813, 8944, 9616, 15626, 17888, 19232, 25843, 31252, 35776, 38464, 51686, 62504, 103372, 125008, 206744, 250016, 335959, 413488, 500032, 671918, 826976, 1343836, 1653952, 2687672, 5375344, 10750688, 21501376]

約数ペア:

[(1, 21501376), (2, 10750688), (4, 5375344), (8, 2687672), (13, 1653952), (16, 1343836), (26, 826976), (32, 671918), (43, 500032), (52, 413488), (64, 335959), (86, 250016), (104, 206744), (172, 125008), (208, 103372), (344, 62504), (416, 51686), (559, 38464), (601, 35776), (688, 31252), (832, 25843), (1118, 19232), (1202, 17888), (1376, 15626), (2236, 9616), (2404, 8944), (2752, 7813), (4472, 4808)]