256426000

素因数分解:

$2^4\times 5^3\times {\mathrm{128213}}^1$

素因数の和:128236

約数の個数: 40

約数和(自身を含む): 620042904

約数和(自身を除く): 363616904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 128213, 256426, 512852, 641065, 1025704, 1282130, 2051408, 2564260, 3205325, 5128520, 6410650, 10257040, 12821300, 16026625, 25642600, 32053250, 51285200, 64106500, 128213000, 256426000]

約数ペア:

[(1, 256426000), (2, 128213000), (4, 64106500), (5, 51285200), (8, 32053250), (10, 25642600), (16, 16026625), (20, 12821300), (25, 10257040), (40, 6410650), (50, 5128520), (80, 3205325), (100, 2564260), (125, 2051408), (200, 1282130), (250, 1025704), (400, 641065), (500, 512852), (1000, 256426), (2000, 128213)]