28615640

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 66908160

約数和(自身を除く): 38292520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 127, 131, 172, 215, 254, 262, 344, 430, 508, 524, 635, 655, 860, 1016, 1048, 1270, 1310, 1720, 2540, 2620, 5080, 5240, 5461, 5633, 10922, 11266, 16637, 21844, 22532, 27305, 28165, 33274, 43688, 45064, 54610, 56330, 66548, 83185, 109220, 112660, 133096, 166370, 218440, 225320, 332740, 665480, 715391, 1430782, 2861564, 3576955, 5723128, 7153910, 14307820, 28615640]

約数ペア:

[(1, 28615640), (2, 14307820), (4, 7153910), (5, 5723128), (8, 3576955), (10, 2861564), (20, 1430782), (40, 715391), (43, 665480), (86, 332740), (127, 225320), (131, 218440), (172, 166370), (215, 133096), (254, 112660), (262, 109220), (344, 83185), (430, 66548), (508, 56330), (524, 54610), (635, 45064), (655, 43688), (860, 33274), (1016, 28165), (1048, 27305), (1270, 22532), (1310, 21844), (1720, 16637), (2540, 11266), (2620, 10922), (5080, 5633), (5240, 5461)]