78998000

素因数分解:

$2^4\times 5^3\times {\mathrm{39499}}^1$

素因数の和:39522

約数の個数: 40

約数和(自身を含む): 191022000

約数和(自身を除く): 112024000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 39499, 78998, 157996, 197495, 315992, 394990, 631984, 789980, 987475, 1579960, 1974950, 3159920, 3949900, 4937375, 7899800, 9874750, 15799600, 19749500, 39499000, 78998000]

約数ペア:

[(1, 78998000), (2, 39499000), (4, 19749500), (5, 15799600), (8, 9874750), (10, 7899800), (16, 4937375), (20, 3949900), (25, 3159920), (40, 1974950), (50, 1579960), (80, 987475), (100, 789980), (125, 631984), (200, 394990), (250, 315992), (400, 197495), (500, 157996), (1000, 78998), (2000, 39499)]