28486040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{641}}^1$

素因数の和:764

約数の個数: 64

約数和(自身を含む): 70722720

約数和(自身を除く): 42236680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 101, 110, 202, 220, 404, 440, 505, 641, 808, 1010, 1111, 1282, 2020, 2222, 2564, 3205, 4040, 4444, 5128, 5555, 6410, 7051, 8888, 11110, 12820, 14102, 22220, 25640, 28204, 35255, 44440, 56408, 64741, 70510, 129482, 141020, 258964, 282040, 323705, 517928, 647410, 712151, 1294820, 1424302, 2589640, 2848604, 3560755, 5697208, 7121510, 14243020, 28486040]

約数ペア:

[(1, 28486040), (2, 14243020), (4, 7121510), (5, 5697208), (8, 3560755), (10, 2848604), (11, 2589640), (20, 1424302), (22, 1294820), (40, 712151), (44, 647410), (55, 517928), (88, 323705), (101, 282040), (110, 258964), (202, 141020), (220, 129482), (404, 70510), (440, 64741), (505, 56408), (641, 44440), (808, 35255), (1010, 28204), (1111, 25640), (1282, 22220), (2020, 14102), (2222, 12820), (2564, 11110), (3205, 8888), (4040, 7051), (4444, 6410), (5128, 5555)]