18987500

素因数分解:

$2^2\times 5^5\times 7^2\times {\mathrm{31}}^1$

素因数の和:74

約数の個数: 108

約数和(自身を含む): 49871808

約数和(自身を除く): 30884308

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 49, 50, 62, 70, 98, 100, 124, 125, 140, 155, 175, 196, 217, 245, 250, 310, 350, 434, 490, 500, 620, 625, 700, 775, 868, 875, 980, 1085, 1225, 1250, 1519, 1550, 1750, 2170, 2450, 2500, 3038, 3100, 3125, 3500, 3875, 4340, 4375, 4900, 5425, 6076, 6125, 6250, 7595, 7750, 8750, 10850, 12250, 12500, 15190, 15500, 17500, 19375, 21700, 21875, 24500, 27125, 30380, 30625, 37975, 38750, 43750, 54250, 61250, 75950, 77500, 87500, 96875, 108500, 122500, 135625, 151900, 153125, 189875, 193750, 271250, 306250, 379750, 387500, 542500, 612500, 678125, 759500, 949375, 1356250, 1898750, 2712500, 3797500, 4746875, 9493750, 18987500]

約数ペア:

[(1, 18987500), (2, 9493750), (4, 4746875), (5, 3797500), (7, 2712500), (10, 1898750), (14, 1356250), (20, 949375), (25, 759500), (28, 678125), (31, 612500), (35, 542500), (49, 387500), (50, 379750), (62, 306250), (70, 271250), (98, 193750), (100, 189875), (124, 153125), (125, 151900), (140, 135625), (155, 122500), (175, 108500), (196, 96875), (217, 87500), (245, 77500), (250, 75950), (310, 61250), (350, 54250), (434, 43750), (490, 38750), (500, 37975), (620, 30625), (625, 30380), (700, 27125), (775, 24500), (868, 21875), (875, 21700), (980, 19375), (1085, 17500), (1225, 15500), (1250, 15190), (1519, 12500), (1550, 12250), (1750, 10850), (2170, 8750), (2450, 7750), (2500, 7595), (3038, 6250), (3100, 6125), (3125, 6076), (3500, 5425), (3875, 4900), (4340, 4375)]