21158096

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{881}}^1$

素因数の和:987

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22589104

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 79, 152, 158, 304, 316, 632, 881, 1264, 1501, 1762, 3002, 3524, 6004, 7048, 12008, 14096, 16739, 24016, 33478, 66956, 69599, 133912, 139198, 267824, 278396, 556792, 1113584, 1322381, 2644762, 5289524, 10579048, 21158096]

約数ペア:

[(1, 21158096), (2, 10579048), (4, 5289524), (8, 2644762), (16, 1322381), (19, 1113584), (38, 556792), (76, 278396), (79, 267824), (152, 139198), (158, 133912), (304, 69599), (316, 66956), (632, 33478), (881, 24016), (1264, 16739), (1501, 14096), (1762, 12008), (3002, 7048), (3524, 6004)]