20647880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{281}}^1$

素因数の和:470

約数の個数: 64

約数和(自身を含む): 51166080

約数和(自身を除く): 30518200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 167, 220, 281, 334, 440, 562, 668, 835, 1124, 1336, 1405, 1670, 1837, 2248, 2810, 3091, 3340, 3674, 5620, 6182, 6680, 7348, 9185, 11240, 12364, 14696, 15455, 18370, 24728, 30910, 36740, 46927, 61820, 73480, 93854, 123640, 187708, 234635, 375416, 469270, 516197, 938540, 1032394, 1877080, 2064788, 2580985, 4129576, 5161970, 10323940, 20647880]

約数ペア:

[(1, 20647880), (2, 10323940), (4, 5161970), (5, 4129576), (8, 2580985), (10, 2064788), (11, 1877080), (20, 1032394), (22, 938540), (40, 516197), (44, 469270), (55, 375416), (88, 234635), (110, 187708), (167, 123640), (220, 93854), (281, 73480), (334, 61820), (440, 46927), (562, 36740), (668, 30910), (835, 24728), (1124, 18370), (1336, 15455), (1405, 14696), (1670, 12364), (1837, 11240), (2248, 9185), (2810, 7348), (3091, 6680), (3340, 6182), (3674, 5620)]