18787878

素因数分解:

$2^1\times 3^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 42131232

約数和(自身を除く): 23343354

約数列:

[1, 2, 3, 6, 9, 18, 61, 71, 122, 142, 183, 213, 241, 366, 426, 482, 549, 639, 723, 1098, 1278, 1446, 2169, 4331, 4338, 8662, 12993, 14701, 17111, 25986, 29402, 34222, 38979, 44103, 51333, 77958, 88206, 102666, 132309, 153999, 264618, 307998, 1043771, 2087542, 3131313, 6262626, 9393939, 18787878]

約数ペア:

[(1, 18787878), (2, 9393939), (3, 6262626), (6, 3131313), (9, 2087542), (18, 1043771), (61, 307998), (71, 264618), (122, 153999), (142, 132309), (183, 102666), (213, 88206), (241, 77958), (366, 51333), (426, 44103), (482, 38979), (549, 34222), (639, 29402), (723, 25986), (1098, 17111), (1278, 14701), (1446, 12993), (2169, 8662), (4331, 4338)]