91990000

素因数分解:

$2^4\times 5^4\times {\mathrm{9199}}^1$

素因数の和:9227

約数の個数: 50

約数和(自身を含む): 222741200

約数和(自身を除く): 130751200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 9199, 10000, 18398, 36796, 45995, 73592, 91990, 147184, 183980, 229975, 367960, 459950, 735920, 919900, 1149875, 1839800, 2299750, 3679600, 4599500, 5749375, 9199000, 11498750, 18398000, 22997500, 45995000, 91990000]

約数ペア:

[(1, 91990000), (2, 45995000), (4, 22997500), (5, 18398000), (8, 11498750), (10, 9199000), (16, 5749375), (20, 4599500), (25, 3679600), (40, 2299750), (50, 1839800), (80, 1149875), (100, 919900), (125, 735920), (200, 459950), (250, 367960), (400, 229975), (500, 183980), (625, 147184), (1000, 91990), (1250, 73592), (2000, 45995), (2500, 36796), (5000, 18398), (9199, 10000)]