21157136

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1321}}^1$

素因数の和:1360

約数の個数: 80

約数和(自身を含む): 55079808

約数和(自身を除く): 33922672

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 16, 22, 26, 28, 44, 52, 56, 77, 88, 91, 104, 112, 143, 154, 176, 182, 208, 286, 308, 364, 572, 616, 728, 1001, 1144, 1232, 1321, 1456, 2002, 2288, 2642, 4004, 5284, 8008, 9247, 10568, 14531, 16016, 17173, 18494, 21136, 29062, 34346, 36988, 58124, 68692, 73976, 101717, 116248, 120211, 137384, 147952, 188903, 203434, 232496, 240422, 274768, 377806, 406868, 480844, 755612, 813736, 961688, 1322321, 1511224, 1627472, 1923376, 2644642, 3022448, 5289284, 10578568, 21157136]

約数ペア:

[(1, 21157136), (2, 10578568), (4, 5289284), (7, 3022448), (8, 2644642), (11, 1923376), (13, 1627472), (14, 1511224), (16, 1322321), (22, 961688), (26, 813736), (28, 755612), (44, 480844), (52, 406868), (56, 377806), (77, 274768), (88, 240422), (91, 232496), (104, 203434), (112, 188903), (143, 147952), (154, 137384), (176, 120211), (182, 116248), (208, 101717), (286, 73976), (308, 68692), (364, 58124), (572, 36988), (616, 34346), (728, 29062), (1001, 21136), (1144, 18494), (1232, 17173), (1321, 16016), (1456, 14531), (2002, 10568), (2288, 9247), (2642, 8008), (4004, 5284)]