9920000

素因数分解:

$2^9\times 5^4\times {\mathrm{31}}^1$

素因数の和:69

約数の個数: 100

約数和(自身を含む): 25566816

約数和(自身を除く): 15646816

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, 3200, 3875, 3968, 4000, 4960, 5000, 6200, 6400, 7750, 7936, 8000, 9920, 10000, 12400, 12800, 15500, 15872, 16000, 19375, 19840, 20000, 24800, 31000, 32000, 38750, 39680, 40000, 49600, 62000, 64000, 77500, 79360, 80000, 99200, 124000, 155000, 160000, 198400, 248000, 310000, 320000, 396800, 496000, 620000, 992000, 1240000, 1984000, 2480000, 4960000, 9920000]

約数ペア:

[(1, 9920000), (2, 4960000), (4, 2480000), (5, 1984000), (8, 1240000), (10, 992000), (16, 620000), (20, 496000), (25, 396800), (31, 320000), (32, 310000), (40, 248000), (50, 198400), (62, 160000), (64, 155000), (80, 124000), (100, 99200), (124, 80000), (125, 79360), (128, 77500), (155, 64000), (160, 62000), (200, 49600), (248, 40000), (250, 39680), (256, 38750), (310, 32000), (320, 31000), (400, 24800), (496, 20000), (500, 19840), (512, 19375), (620, 16000), (625, 15872), (640, 15500), (775, 12800), (800, 12400), (992, 10000), (1000, 9920), (1240, 8000), (1250, 7936), (1280, 7750), (1550, 6400), (1600, 6200), (1984, 5000), (2000, 4960), (2480, 4000), (2500, 3968), (2560, 3875), (3100, 3200)]