19685000

素因数分解:

$2^3\times 5^4\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:184

約数の個数: 80

約数和(自身を含む): 47984640

約数和(自身を除く): 28299640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 127, 155, 200, 248, 250, 254, 310, 500, 508, 620, 625, 635, 775, 1000, 1016, 1240, 1250, 1270, 1550, 2500, 2540, 3100, 3175, 3875, 3937, 5000, 5080, 6200, 6350, 7750, 7874, 12700, 15500, 15748, 15875, 19375, 19685, 25400, 31000, 31496, 31750, 38750, 39370, 63500, 77500, 78740, 79375, 98425, 127000, 155000, 157480, 158750, 196850, 317500, 393700, 492125, 635000, 787400, 984250, 1968500, 2460625, 3937000, 4921250, 9842500, 19685000]

約数ペア:

[(1, 19685000), (2, 9842500), (4, 4921250), (5, 3937000), (8, 2460625), (10, 1968500), (20, 984250), (25, 787400), (31, 635000), (40, 492125), (50, 393700), (62, 317500), (100, 196850), (124, 158750), (125, 157480), (127, 155000), (155, 127000), (200, 98425), (248, 79375), (250, 78740), (254, 77500), (310, 63500), (500, 39370), (508, 38750), (620, 31750), (625, 31496), (635, 31000), (775, 25400), (1000, 19685), (1016, 19375), (1240, 15875), (1250, 15748), (1270, 15500), (1550, 12700), (2500, 7874), (2540, 7750), (3100, 6350), (3175, 6200), (3875, 5080), (3937, 5000)]