20930080

素因数分解:

$2^5\times 5^1\times {\mathrm{257}}^1\times {\mathrm{509}}^1$

素因数の和:781

約数の個数: 48

約数和(自身を含む): 49737240

約数和(自身を除く): 28807160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 257, 509, 514, 1018, 1028, 1285, 2036, 2056, 2545, 2570, 4072, 4112, 5090, 5140, 8144, 8224, 10180, 10280, 16288, 20360, 20560, 40720, 41120, 81440, 130813, 261626, 523252, 654065, 1046504, 1308130, 2093008, 2616260, 4186016, 5232520, 10465040, 20930080]

約数ペア:

[(1, 20930080), (2, 10465040), (4, 5232520), (5, 4186016), (8, 2616260), (10, 2093008), (16, 1308130), (20, 1046504), (32, 654065), (40, 523252), (80, 261626), (160, 130813), (257, 81440), (509, 41120), (514, 40720), (1018, 20560), (1028, 20360), (1285, 16288), (2036, 10280), (2056, 10180), (2545, 8224), (2570, 8144), (4072, 5140), (4112, 5090)]