1280212000

素因数分解:

$2^5\times 5^3\times {\mathrm{320053}}^1$

素因数の和:320078

約数の個数: 48

約数和(自身を含む): 3145490712

約数和(自身を除く): 1865278712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 320053, 640106, 1280212, 1600265, 2560424, 3200530, 5120848, 6401060, 8001325, 10241696, 12802120, 16002650, 25604240, 32005300, 40006625, 51208480, 64010600, 80013250, 128021200, 160026500, 256042400, 320053000, 640106000, 1280212000]

約数ペア:

[(1, 1280212000), (2, 640106000), (4, 320053000), (5, 256042400), (8, 160026500), (10, 128021200), (16, 80013250), (20, 64010600), (25, 51208480), (32, 40006625), (40, 32005300), (50, 25604240), (80, 16002650), (100, 12802120), (125, 10241696), (160, 8001325), (200, 6401060), (250, 5120848), (400, 3200530), (500, 2560424), (800, 1600265), (1000, 1280212), (2000, 640106), (4000, 320053)]