19790000

素因数分解:

$2^4\times 5^4\times {\mathrm{1979}}^1$

素因数の和:2007

約数の個数: 50

約数和(自身を含む): 47937780

約数和(自身を除く): 28147780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1979, 2000, 2500, 3958, 5000, 7916, 9895, 10000, 15832, 19790, 31664, 39580, 49475, 79160, 98950, 158320, 197900, 247375, 395800, 494750, 791600, 989500, 1236875, 1979000, 2473750, 3958000, 4947500, 9895000, 19790000]

約数ペア:

[(1, 19790000), (2, 9895000), (4, 4947500), (5, 3958000), (8, 2473750), (10, 1979000), (16, 1236875), (20, 989500), (25, 791600), (40, 494750), (50, 395800), (80, 247375), (100, 197900), (125, 158320), (200, 98950), (250, 79160), (400, 49475), (500, 39580), (625, 31664), (1000, 19790), (1250, 15832), (1979, 10000), (2000, 9895), (2500, 7916), (3958, 5000)]