81398000

素因数分解:

$2^4\times 5^3\times {\mathrm{40699}}^1$

素因数の和:40722

約数の個数: 40

約数和(自身を含む): 196825200

約数和(自身を除く): 115427200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 40699, 81398, 162796, 203495, 325592, 406990, 651184, 813980, 1017475, 1627960, 2034950, 3255920, 4069900, 5087375, 8139800, 10174750, 16279600, 20349500, 40699000, 81398000]

約数ペア:

[(1, 81398000), (2, 40699000), (4, 20349500), (5, 16279600), (8, 10174750), (10, 8139800), (16, 5087375), (20, 4069900), (25, 3255920), (40, 2034950), (50, 1627960), (80, 1017475), (100, 813980), (125, 651184), (200, 406990), (250, 325592), (400, 203495), (500, 162796), (1000, 81398), (2000, 40699)]