81605720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{7877}}^1$

素因数の和:7932

約数の個数: 64

約数和(自身を含む): 215542080

約数和(自身を除く): 133936360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 140, 148, 185, 259, 280, 296, 370, 518, 740, 1036, 1295, 1480, 2072, 2590, 5180, 7877, 10360, 15754, 31508, 39385, 55139, 63016, 78770, 110278, 157540, 220556, 275695, 291449, 315080, 441112, 551390, 582898, 1102780, 1165796, 1457245, 2040143, 2205560, 2331592, 2914490, 4080286, 5828980, 8160572, 10200715, 11657960, 16321144, 20401430, 40802860, 81605720]

約数ペア:

[(1, 81605720), (2, 40802860), (4, 20401430), (5, 16321144), (7, 11657960), (8, 10200715), (10, 8160572), (14, 5828980), (20, 4080286), (28, 2914490), (35, 2331592), (37, 2205560), (40, 2040143), (56, 1457245), (70, 1165796), (74, 1102780), (140, 582898), (148, 551390), (185, 441112), (259, 315080), (280, 291449), (296, 275695), (370, 220556), (518, 157540), (740, 110278), (1036, 78770), (1295, 63016), (1480, 55139), (2072, 39385), (2590, 31508), (5180, 15754), (7877, 10360)]