19857123

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:209

約数の個数: 64

約数和(自身を含む): 35750400

約数和(自身を除く): 15893277

約数列:

[1, 3, 9, 11, 13, 27, 33, 37, 39, 99, 111, 117, 139, 143, 297, 333, 351, 407, 417, 429, 481, 999, 1221, 1251, 1287, 1443, 1529, 1807, 3663, 3753, 3861, 4329, 4587, 5143, 5291, 5421, 10989, 12987, 13761, 15429, 15873, 16263, 19877, 41283, 46287, 47619, 48789, 56573, 59631, 66859, 138861, 142857, 169719, 178893, 200577, 509157, 536679, 601731, 735449, 1527471, 1805193, 2206347, 6619041, 19857123]

約数ペア:

[(1, 19857123), (3, 6619041), (9, 2206347), (11, 1805193), (13, 1527471), (27, 735449), (33, 601731), (37, 536679), (39, 509157), (99, 200577), (111, 178893), (117, 169719), (139, 142857), (143, 138861), (297, 66859), (333, 59631), (351, 56573), (407, 48789), (417, 47619), (429, 46287), (481, 41283), (999, 19877), (1221, 16263), (1251, 15873), (1287, 15429), (1443, 13761), (1529, 12987), (1807, 10989), (3663, 5421), (3753, 5291), (3861, 5143), (4329, 4587)]