18890235

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{659}}^1$

素因数の和:697

約数の個数: 72

約数和(自身を含む): 41081040

約数和(自身を除く): 22190805

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 49, 63, 65, 91, 105, 117, 147, 195, 245, 273, 315, 441, 455, 585, 637, 659, 735, 819, 1365, 1911, 1977, 2205, 3185, 3295, 4095, 4613, 5733, 5931, 8567, 9555, 9885, 13839, 23065, 25701, 28665, 29655, 32291, 41517, 42835, 59969, 69195, 77103, 96873, 128505, 161455, 179907, 207585, 290619, 299845, 385515, 419783, 484365, 539721, 899535, 1259349, 1453095, 2098915, 2698605, 3778047, 6296745, 18890235]

約数ペア:

[(1, 18890235), (3, 6296745), (5, 3778047), (7, 2698605), (9, 2098915), (13, 1453095), (15, 1259349), (21, 899535), (35, 539721), (39, 484365), (45, 419783), (49, 385515), (63, 299845), (65, 290619), (91, 207585), (105, 179907), (117, 161455), (147, 128505), (195, 96873), (245, 77103), (273, 69195), (315, 59969), (441, 42835), (455, 41517), (585, 32291), (637, 29655), (659, 28665), (735, 25701), (819, 23065), (1365, 13839), (1911, 9885), (1977, 9555), (2205, 8567), (3185, 5931), (3295, 5733), (4095, 4613)]