18914960

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:336

約数の個数: 80

約数和(自身を含む): 47139840

約数和(自身を除く): 28224880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 40, 58, 62, 80, 116, 124, 145, 155, 232, 248, 263, 290, 310, 464, 496, 526, 580, 620, 899, 1052, 1160, 1240, 1315, 1798, 2104, 2320, 2480, 2630, 3596, 4208, 4495, 5260, 7192, 7627, 8153, 8990, 10520, 14384, 15254, 16306, 17980, 21040, 30508, 32612, 35960, 38135, 40765, 61016, 65224, 71920, 76270, 81530, 122032, 130448, 152540, 163060, 236437, 305080, 326120, 472874, 610160, 652240, 945748, 1182185, 1891496, 2364370, 3782992, 4728740, 9457480, 18914960]

約数ペア:

[(1, 18914960), (2, 9457480), (4, 4728740), (5, 3782992), (8, 2364370), (10, 1891496), (16, 1182185), (20, 945748), (29, 652240), (31, 610160), (40, 472874), (58, 326120), (62, 305080), (80, 236437), (116, 163060), (124, 152540), (145, 130448), (155, 122032), (232, 81530), (248, 76270), (263, 71920), (290, 65224), (310, 61016), (464, 40765), (496, 38135), (526, 35960), (580, 32612), (620, 30508), (899, 21040), (1052, 17980), (1160, 16306), (1240, 15254), (1315, 14384), (1798, 10520), (2104, 8990), (2320, 8153), (2480, 7627), (2630, 7192), (3596, 5260), (4208, 4495)]