31000000

素因数分解:

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

素因数の和:73

約数の個数: 98

約数和(自身を含む): 79373984

約数和(自身を除く): 48373984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 64, 80, 100, 124, 125, 155, 160, 200, 248, 250, 310, 320, 400, 496, 500, 620, 625, 775, 800, 992, 1000, 1240, 1250, 1550, 1600, 1984, 2000, 2480, 2500, 3100, 3125, 3875, 4000, 4960, 5000, 6200, 6250, 7750, 8000, 9920, 10000, 12400, 12500, 15500, 15625, 19375, 20000, 24800, 25000, 31000, 31250, 38750, 40000, 49600, 50000, 62000, 62500, 77500, 96875, 100000, 124000, 125000, 155000, 193750, 200000, 248000, 250000, 310000, 387500, 484375, 500000, 620000, 775000, 968750, 1000000, 1240000, 1550000, 1937500, 3100000, 3875000, 6200000, 7750000, 15500000, 31000000]

約数ペア:

[(1, 31000000), (2, 15500000), (4, 7750000), (5, 6200000), (8, 3875000), (10, 3100000), (16, 1937500), (20, 1550000), (25, 1240000), (31, 1000000), (32, 968750), (40, 775000), (50, 620000), (62, 500000), (64, 484375), (80, 387500), (100, 310000), (124, 250000), (125, 248000), (155, 200000), (160, 193750), (200, 155000), (248, 125000), (250, 124000), (310, 100000), (320, 96875), (400, 77500), (496, 62500), (500, 62000), (620, 50000), (625, 49600), (775, 40000), (800, 38750), (992, 31250), (1000, 31000), (1240, 25000), (1250, 24800), (1550, 20000), (1600, 19375), (1984, 15625), (2000, 15500), (2480, 12500), (2500, 12400), (3100, 10000), (3125, 9920), (3875, 8000), (4000, 7750), (4960, 6250), (5000, 6200)]