19901000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{2843}}^1$

素因数の和:2871

約数の個数: 64

約数和(自身を含む): 53239680

約数和(自身を除く): 33338680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 350, 500, 700, 875, 1000, 1400, 1750, 2843, 3500, 5686, 7000, 11372, 14215, 19901, 22744, 28430, 39802, 56860, 71075, 79604, 99505, 113720, 142150, 159208, 199010, 284300, 355375, 398020, 497525, 568600, 710750, 796040, 995050, 1421500, 1990100, 2487625, 2843000, 3980200, 4975250, 9950500, 19901000]

約数ペア:

[(1, 19901000), (2, 9950500), (4, 4975250), (5, 3980200), (7, 2843000), (8, 2487625), (10, 1990100), (14, 1421500), (20, 995050), (25, 796040), (28, 710750), (35, 568600), (40, 497525), (50, 398020), (56, 355375), (70, 284300), (100, 199010), (125, 159208), (140, 142150), (175, 113720), (200, 99505), (250, 79604), (280, 71075), (350, 56860), (500, 39802), (700, 28430), (875, 22744), (1000, 19901), (1400, 14215), (1750, 11372), (2843, 7000), (3500, 5686)]