19979000

素因数分解:

$2^3\times 5^3\times {\mathrm{19979}}^1$

素因数の和:20000

約数の個数: 32

約数和(自身を含む): 46753200

約数和(自身を除く): 26774200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 19979, 39958, 79916, 99895, 159832, 199790, 399580, 499475, 799160, 998950, 1997900, 2497375, 3995800, 4994750, 9989500, 19979000]

約数ペア:

[(1, 19979000), (2, 9989500), (4, 4994750), (5, 3995800), (8, 2497375), (10, 1997900), (20, 998950), (25, 799160), (40, 499475), (50, 399580), (100, 199790), (125, 159832), (200, 99895), (250, 79916), (500, 39958), (1000, 19979)]