20486840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{461}}^1$

素因数の和:584

約数の個数: 64

約数和(自身を含む): 50893920

約数和(自身を除く): 30407080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 101, 110, 202, 220, 404, 440, 461, 505, 808, 922, 1010, 1111, 1844, 2020, 2222, 2305, 3688, 4040, 4444, 4610, 5071, 5555, 8888, 9220, 10142, 11110, 18440, 20284, 22220, 25355, 40568, 44440, 46561, 50710, 93122, 101420, 186244, 202840, 232805, 372488, 465610, 512171, 931220, 1024342, 1862440, 2048684, 2560855, 4097368, 5121710, 10243420, 20486840]

約数ペア:

[(1, 20486840), (2, 10243420), (4, 5121710), (5, 4097368), (8, 2560855), (10, 2048684), (11, 1862440), (20, 1024342), (22, 931220), (40, 512171), (44, 465610), (55, 372488), (88, 232805), (101, 202840), (110, 186244), (202, 101420), (220, 93122), (404, 50710), (440, 46561), (461, 44440), (505, 40568), (808, 25355), (922, 22220), (1010, 20284), (1111, 18440), (1844, 11110), (2020, 10142), (2222, 9220), (2305, 8888), (3688, 5555), (4040, 5071), (4444, 4610)]