21157794

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{223}}^1\times {\mathrm{251}}^1$

素因数の和:492

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 33032286

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 223, 251, 378, 446, 502, 669, 753, 1338, 1506, 1561, 1757, 2007, 2259, 3122, 3514, 4014, 4518, 4683, 5271, 6021, 6777, 9366, 10542, 12042, 13554, 14049, 15813, 28098, 31626, 42147, 47439, 55973, 84294, 94878, 111946, 167919, 335838, 391811, 503757, 783622, 1007514, 1175433, 1511271, 2350866, 3022542, 3526299, 7052598, 10578897, 21157794]

約数ペア:

[(1, 21157794), (2, 10578897), (3, 7052598), (6, 3526299), (7, 3022542), (9, 2350866), (14, 1511271), (18, 1175433), (21, 1007514), (27, 783622), (42, 503757), (54, 391811), (63, 335838), (126, 167919), (189, 111946), (223, 94878), (251, 84294), (378, 55973), (446, 47439), (502, 42147), (669, 31626), (753, 28098), (1338, 15813), (1506, 14049), (1561, 13554), (1757, 12042), (2007, 10542), (2259, 9366), (3122, 6777), (3514, 6021), (4014, 5271), (4518, 4683)]