248000000

素因数分解:

$2^9\times 5^6\times {\mathrm{31}}^1$

素因数の和:79

約数の個数: 140

約数和(自身を含む): 639366816

約数和(自身を除く): 391366816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 64, 80, 100, 124, 125, 128, 155, 160, 200, 248, 250, 256, 310, 320, 400, 496, 500, 512, 620, 625, 640, 775, 800, 992, 1000, 1240, 1250, 1280, 1550, 1600, 1984, 2000, 2480, 2500, 2560, 3100, 3125, 3200, 3875, 3968, 4000, 4960, 5000, 6200, 6250, 6400, 7750, 7936, 8000, 9920, 10000, 12400, 12500, 12800, 15500, 15625, 15872, 16000, 19375, 19840, 20000, 24800, 25000, 31000, 31250, 32000, 38750, 39680, 40000, 49600, 50000, 62000, 62500, 64000, 77500, 79360, 80000, 96875, 99200, 100000, 124000, 125000, 155000, 160000, 193750, 198400, 200000, 248000, 250000, 310000, 320000, 387500, 396800, 400000, 484375, 496000, 500000, 620000, 775000, 800000, 968750, 992000, 1000000, 1240000, 1550000, 1600000, 1937500, 1984000, 2000000, 2480000, 3100000, 3875000, 4000000, 4960000, 6200000, 7750000, 8000000, 9920000, 12400000, 15500000, 24800000, 31000000, 49600000, 62000000, 124000000, 248000000]

約数ペア:

[(1, 248000000), (2, 124000000), (4, 62000000), (5, 49600000), (8, 31000000), (10, 24800000), (16, 15500000), (20, 12400000), (25, 9920000), (31, 8000000), (32, 7750000), (40, 6200000), (50, 4960000), (62, 4000000), (64, 3875000), (80, 3100000), (100, 2480000), (124, 2000000), (125, 1984000), (128, 1937500), (155, 1600000), (160, 1550000), (200, 1240000), (248, 1000000), (250, 992000), (256, 968750), (310, 800000), (320, 775000), (400, 620000), (496, 500000), (500, 496000), (512, 484375), (620, 400000), (625, 396800), (640, 387500), (775, 320000), (800, 310000), (992, 250000), (1000, 248000), (1240, 200000), (1250, 198400), (1280, 193750), (1550, 160000), (1600, 155000), (1984, 125000), (2000, 124000), (2480, 100000), (2500, 99200), (2560, 96875), (3100, 80000), (3125, 79360), (3200, 77500), (3875, 64000), (3968, 62500), (4000, 62000), (4960, 50000), (5000, 49600), (6200, 40000), (6250, 39680), (6400, 38750), (7750, 32000), (7936, 31250), (8000, 31000), (9920, 25000), (10000, 24800), (12400, 20000), (12500, 19840), (12800, 19375), (15500, 16000), (15625, 15872)]