18888610

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 39029760

約数和(自身を除く): 20141150

約数列:

[1, 2, 5, 10, 13, 26, 31, 43, 62, 65, 86, 109, 130, 155, 215, 218, 310, 403, 430, 545, 559, 806, 1090, 1118, 1333, 1417, 2015, 2666, 2795, 2834, 3379, 4030, 4687, 5590, 6665, 6758, 7085, 9374, 13330, 14170, 16895, 17329, 23435, 33790, 34658, 43927, 46870, 60931, 86645, 87854, 121862, 145297, 173290, 219635, 290594, 304655, 439270, 609310, 726485, 1452970, 1888861, 3777722, 9444305, 18888610]

約数ペア:

[(1, 18888610), (2, 9444305), (5, 3777722), (10, 1888861), (13, 1452970), (26, 726485), (31, 609310), (43, 439270), (62, 304655), (65, 290594), (86, 219635), (109, 173290), (130, 145297), (155, 121862), (215, 87854), (218, 86645), (310, 60931), (403, 46870), (430, 43927), (545, 34658), (559, 33790), (806, 23435), (1090, 17329), (1118, 16895), (1333, 14170), (1417, 13330), (2015, 9374), (2666, 7085), (2795, 6758), (2834, 6665), (3379, 5590), (4030, 4687)]