19657989

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 33196800

約数和(自身を除く): 13538811

約数列:

[1, 3, 9, 13, 19, 37, 39, 57, 111, 117, 171, 239, 247, 333, 481, 703, 717, 741, 1443, 2109, 2151, 2223, 3107, 4329, 4541, 6327, 8843, 9139, 9321, 13623, 26529, 27417, 27963, 40869, 59033, 79587, 82251, 114959, 168017, 177099, 344877, 504051, 531297, 1034631, 1512153, 2184221, 6552663, 19657989]

約数ペア:

[(1, 19657989), (3, 6552663), (9, 2184221), (13, 1512153), (19, 1034631), (37, 531297), (39, 504051), (57, 344877), (111, 177099), (117, 168017), (171, 114959), (239, 82251), (247, 79587), (333, 59033), (481, 40869), (703, 27963), (717, 27417), (741, 26529), (1443, 13623), (2109, 9321), (2151, 9139), (2223, 8843), (3107, 6327), (4329, 4541)]