18835479

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 31813600

約数和(自身を除く): 12978121

約数列:

[1, 3, 9, 13, 19, 37, 39, 57, 111, 117, 171, 229, 247, 333, 481, 687, 703, 741, 1443, 2061, 2109, 2223, 2977, 4329, 4351, 6327, 8473, 8931, 9139, 13053, 25419, 26793, 27417, 39159, 56563, 76257, 82251, 110149, 160987, 169689, 330447, 482961, 509067, 991341, 1448883, 2092831, 6278493, 18835479]

約数ペア:

[(1, 18835479), (3, 6278493), (9, 2092831), (13, 1448883), (19, 991341), (37, 509067), (39, 482961), (57, 330447), (111, 169689), (117, 160987), (171, 110149), (229, 82251), (247, 76257), (333, 56563), (481, 39159), (687, 27417), (703, 26793), (741, 25419), (1443, 13053), (2061, 9139), (2109, 8931), (2223, 8473), (2977, 6327), (4329, 4351)]