647641328

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{311}}^1\times {\mathrm{829}}^1$

素因数の和:1305

約数の個数: 40

約数和(自身を含む): 1268386080

約数和(自身を除く): 620744752

約数列:

[1, 2, 4, 8, 16, 157, 311, 314, 622, 628, 829, 1244, 1256, 1658, 2488, 2512, 3316, 4976, 6632, 13264, 48827, 97654, 130153, 195308, 257819, 260306, 390616, 515638, 520612, 781232, 1031276, 1041224, 2062552, 2082448, 4125104, 40477583, 80955166, 161910332, 323820664, 647641328]

約数ペア:

[(1, 647641328), (2, 323820664), (4, 161910332), (8, 80955166), (16, 40477583), (157, 4125104), (311, 2082448), (314, 2062552), (622, 1041224), (628, 1031276), (829, 781232), (1244, 520612), (1256, 515638), (1658, 390616), (2488, 260306), (2512, 257819), (3316, 195308), (4976, 130153), (6632, 97654), (13264, 48827)]