28170280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 65998800

約数和(自身を除く): 37828520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 89, 164, 178, 193, 205, 328, 356, 386, 410, 445, 712, 772, 820, 890, 965, 1544, 1640, 1780, 1930, 3560, 3649, 3860, 7298, 7720, 7913, 14596, 15826, 17177, 18245, 29192, 31652, 34354, 36490, 39565, 63304, 68708, 72980, 79130, 85885, 137416, 145960, 158260, 171770, 316520, 343540, 687080, 704257, 1408514, 2817028, 3521285, 5634056, 7042570, 14085140, 28170280]

約数ペア:

[(1, 28170280), (2, 14085140), (4, 7042570), (5, 5634056), (8, 3521285), (10, 2817028), (20, 1408514), (40, 704257), (41, 687080), (82, 343540), (89, 316520), (164, 171770), (178, 158260), (193, 145960), (205, 137416), (328, 85885), (356, 79130), (386, 72980), (410, 68708), (445, 63304), (712, 39565), (772, 36490), (820, 34354), (890, 31652), (965, 29192), (1544, 18245), (1640, 17177), (1780, 15826), (1930, 14596), (3560, 7913), (3649, 7720), (3860, 7298)]