19919750

素因数分解:

$2^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:186

約数の個数: 64

約数和(自身を含む): 40772160

約数和(自身を除く): 20852410

約数列:

[1, 2, 5, 10, 17, 25, 34, 43, 50, 85, 86, 109, 125, 170, 215, 218, 250, 425, 430, 545, 731, 850, 1075, 1090, 1462, 1853, 2125, 2150, 2725, 3655, 3706, 4250, 4687, 5375, 5450, 7310, 9265, 9374, 10750, 13625, 18275, 18530, 23435, 27250, 36550, 46325, 46870, 79679, 91375, 92650, 117175, 159358, 182750, 231625, 234350, 398395, 463250, 585875, 796790, 1171750, 1991975, 3983950, 9959875, 19919750]

約数ペア:

[(1, 19919750), (2, 9959875), (5, 3983950), (10, 1991975), (17, 1171750), (25, 796790), (34, 585875), (43, 463250), (50, 398395), (85, 234350), (86, 231625), (109, 182750), (125, 159358), (170, 117175), (215, 92650), (218, 91375), (250, 79679), (425, 46870), (430, 46325), (545, 36550), (731, 27250), (850, 23435), (1075, 18530), (1090, 18275), (1462, 13625), (1853, 10750), (2125, 9374), (2150, 9265), (2725, 7310), (3655, 5450), (3706, 5375), (4250, 4687)]