77281720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47123}}^1$

素因数の和:47175

約数の個数: 32

約数和(自身を含む): 178128720

約数和(自身を除く): 100847000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 47123, 94246, 188492, 235615, 376984, 471230, 942460, 1884920, 1932043, 3864086, 7728172, 9660215, 15456344, 19320430, 38640860, 77281720]

約数ペア:

[(1, 77281720), (2, 38640860), (4, 19320430), (5, 15456344), (8, 9660215), (10, 7728172), (20, 3864086), (40, 1932043), (41, 1884920), (82, 942460), (164, 471230), (205, 376984), (328, 235615), (410, 188492), (820, 94246), (1640, 47123)]