199912000

素因数分解:

$2^6\times 5^3\times {\mathrm{24989}}^1$

素因数の和:25016

約数の個数: 56

約数和(自身を含む): 495101880

約数和(自身を除く): 295189880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 800, 1000, 1600, 2000, 4000, 8000, 24989, 49978, 99956, 124945, 199912, 249890, 399824, 499780, 624725, 799648, 999560, 1249450, 1599296, 1999120, 2498900, 3123625, 3998240, 4997800, 6247250, 7996480, 9995600, 12494500, 19991200, 24989000, 39982400, 49978000, 99956000, 199912000]

約数ペア:

[(1, 199912000), (2, 99956000), (4, 49978000), (5, 39982400), (8, 24989000), (10, 19991200), (16, 12494500), (20, 9995600), (25, 7996480), (32, 6247250), (40, 4997800), (50, 3998240), (64, 3123625), (80, 2498900), (100, 1999120), (125, 1599296), (160, 1249450), (200, 999560), (250, 799648), (320, 624725), (400, 499780), (500, 399824), (800, 249890), (1000, 199912), (1600, 124945), (2000, 99956), (4000, 49978), (8000, 24989)]