18975255

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 64

約数和(自身を含む): 35008512

約数和(自身を除く): 16033257

約数列:

[1, 3, 5, 13, 15, 31, 39, 43, 65, 73, 93, 129, 155, 195, 215, 219, 365, 403, 465, 559, 645, 949, 1095, 1209, 1333, 1677, 2015, 2263, 2795, 2847, 3139, 3999, 4745, 6045, 6665, 6789, 8385, 9417, 11315, 14235, 15695, 17329, 19995, 29419, 33945, 40807, 47085, 51987, 86645, 88257, 97309, 122421, 147095, 204035, 259935, 291927, 441285, 486545, 612105, 1265017, 1459635, 3795051, 6325085, 18975255]

約数ペア:

[(1, 18975255), (3, 6325085), (5, 3795051), (13, 1459635), (15, 1265017), (31, 612105), (39, 486545), (43, 441285), (65, 291927), (73, 259935), (93, 204035), (129, 147095), (155, 122421), (195, 97309), (215, 88257), (219, 86645), (365, 51987), (403, 47085), (465, 40807), (559, 33945), (645, 29419), (949, 19995), (1095, 17329), (1209, 15695), (1333, 14235), (1677, 11315), (2015, 9417), (2263, 8385), (2795, 6789), (2847, 6665), (3139, 6045), (3999, 4745)]