19865000

素因数分解:

$2^3\times 5^4\times {\mathrm{29}}^1\times {\mathrm{137}}^1$

素因数の和:192

約数の個数: 80

約数和(自身を含む): 48500100

約数和(自身を除く): 28635100

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 29, 40, 50, 58, 100, 116, 125, 137, 145, 200, 232, 250, 274, 290, 500, 548, 580, 625, 685, 725, 1000, 1096, 1160, 1250, 1370, 1450, 2500, 2740, 2900, 3425, 3625, 3973, 5000, 5480, 5800, 6850, 7250, 7946, 13700, 14500, 15892, 17125, 18125, 19865, 27400, 29000, 31784, 34250, 36250, 39730, 68500, 72500, 79460, 85625, 99325, 137000, 145000, 158920, 171250, 198650, 342500, 397300, 496625, 685000, 794600, 993250, 1986500, 2483125, 3973000, 4966250, 9932500, 19865000]

約数ペア:

[(1, 19865000), (2, 9932500), (4, 4966250), (5, 3973000), (8, 2483125), (10, 1986500), (20, 993250), (25, 794600), (29, 685000), (40, 496625), (50, 397300), (58, 342500), (100, 198650), (116, 171250), (125, 158920), (137, 145000), (145, 137000), (200, 99325), (232, 85625), (250, 79460), (274, 72500), (290, 68500), (500, 39730), (548, 36250), (580, 34250), (625, 31784), (685, 29000), (725, 27400), (1000, 19865), (1096, 18125), (1160, 17125), (1250, 15892), (1370, 14500), (1450, 13700), (2500, 7946), (2740, 7250), (2900, 6850), (3425, 5800), (3625, 5480), (3973, 5000)]