18780645

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 35239680

約数和(自身を除く): 16459035

約数列:

[1, 3, 5, 13, 15, 19, 37, 39, 57, 65, 95, 111, 137, 185, 195, 247, 285, 411, 481, 555, 685, 703, 741, 1235, 1443, 1781, 2055, 2109, 2405, 2603, 3515, 3705, 5069, 5343, 7215, 7809, 8905, 9139, 10545, 13015, 15207, 25345, 26715, 27417, 33839, 39045, 45695, 65897, 76035, 96311, 101517, 137085, 169195, 197691, 288933, 329485, 481555, 507585, 988455, 1252043, 1444665, 3756129, 6260215, 18780645]

約数ペア:

[(1, 18780645), (3, 6260215), (5, 3756129), (13, 1444665), (15, 1252043), (19, 988455), (37, 507585), (39, 481555), (57, 329485), (65, 288933), (95, 197691), (111, 169195), (137, 137085), (185, 101517), (195, 96311), (247, 76035), (285, 65897), (411, 45695), (481, 39045), (555, 33839), (685, 27417), (703, 26715), (741, 25345), (1235, 15207), (1443, 13015), (1781, 10545), (2055, 9139), (2109, 8905), (2405, 7809), (2603, 7215), (3515, 5343), (3705, 5069)]