201920000

素因数分解:

$2^9\times 5^4\times {\mathrm{631}}^1$

素因数の和:669

約数の個数: 100

約数和(自身を含む): 504944616

約数和(自身を除く): 303024616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 512, 625, 631, 640, 800, 1000, 1250, 1262, 1280, 1600, 2000, 2500, 2524, 2560, 3155, 3200, 4000, 5000, 5048, 6310, 6400, 8000, 10000, 10096, 12620, 12800, 15775, 16000, 20000, 20192, 25240, 31550, 32000, 40000, 40384, 50480, 63100, 64000, 78875, 80000, 80768, 100960, 126200, 157750, 160000, 161536, 201920, 252400, 315500, 320000, 323072, 394375, 403840, 504800, 631000, 788750, 807680, 1009600, 1262000, 1577500, 1615360, 2019200, 2524000, 3155000, 4038400, 5048000, 6310000, 8076800, 10096000, 12620000, 20192000, 25240000, 40384000, 50480000, 100960000, 201920000]

約数ペア:

[(1, 201920000), (2, 100960000), (4, 50480000), (5, 40384000), (8, 25240000), (10, 20192000), (16, 12620000), (20, 10096000), (25, 8076800), (32, 6310000), (40, 5048000), (50, 4038400), (64, 3155000), (80, 2524000), (100, 2019200), (125, 1615360), (128, 1577500), (160, 1262000), (200, 1009600), (250, 807680), (256, 788750), (320, 631000), (400, 504800), (500, 403840), (512, 394375), (625, 323072), (631, 320000), (640, 315500), (800, 252400), (1000, 201920), (1250, 161536), (1262, 160000), (1280, 157750), (1600, 126200), (2000, 100960), (2500, 80768), (2524, 80000), (2560, 78875), (3155, 64000), (3200, 63100), (4000, 50480), (5000, 40384), (5048, 40000), (6310, 32000), (6400, 31550), (8000, 25240), (10000, 20192), (10096, 20000), (12620, 16000), (12800, 15775)]