394000

素因数分解:

$2^4\times 5^3\times {\mathrm{197}}^1$

素因数の和:220

約数の個数: 40

約数和(自身を含む): 957528

約数和(自身を除く): 563528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 197, 200, 250, 394, 400, 500, 788, 985, 1000, 1576, 1970, 2000, 3152, 3940, 4925, 7880, 9850, 15760, 19700, 24625, 39400, 49250, 78800, 98500, 197000, 394000]

約数ペア:

[(1, 394000), (2, 197000), (4, 98500), (5, 78800), (8, 49250), (10, 39400), (16, 24625), (20, 19700), (25, 15760), (40, 9850), (50, 7880), (80, 4925), (100, 3940), (125, 3152), (197, 2000), (200, 1970), (250, 1576), (394, 1000), (400, 985), (500, 788)]