21217768

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1091}}^1$

素因数の和:1138

約数の個数: 64

約数和(自身を含む): 49533120

約数和(自身を除く): 28315352

約数列:

[1, 2, 4, 8, 11, 13, 17, 22, 26, 34, 44, 52, 68, 88, 104, 136, 143, 187, 221, 286, 374, 442, 572, 748, 884, 1091, 1144, 1496, 1768, 2182, 2431, 4364, 4862, 8728, 9724, 12001, 14183, 18547, 19448, 24002, 28366, 37094, 48004, 56732, 74188, 96008, 113464, 148376, 156013, 204017, 241111, 312026, 408034, 482222, 624052, 816068, 964444, 1248104, 1632136, 1928888, 2652221, 5304442, 10608884, 21217768]

約数ペア:

[(1, 21217768), (2, 10608884), (4, 5304442), (8, 2652221), (11, 1928888), (13, 1632136), (17, 1248104), (22, 964444), (26, 816068), (34, 624052), (44, 482222), (52, 408034), (68, 312026), (88, 241111), (104, 204017), (136, 156013), (143, 148376), (187, 113464), (221, 96008), (286, 74188), (374, 56732), (442, 48004), (572, 37094), (748, 28366), (884, 24002), (1091, 19448), (1144, 18547), (1496, 14183), (1768, 12001), (2182, 9724), (2431, 8728), (4364, 4862)]