20156000

素因数分解:

$2^5\times 5^3\times {\mathrm{5039}}^1$

素因数の和:5064

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 29377120

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, 5039, 10078, 20156, 25195, 40312, 50390, 80624, 100780, 125975, 161248, 201560, 251950, 403120, 503900, 629875, 806240, 1007800, 1259750, 2015600, 2519500, 4031200, 5039000, 10078000, 20156000]

約数ペア:

[(1, 20156000), (2, 10078000), (4, 5039000), (5, 4031200), (8, 2519500), (10, 2015600), (16, 1259750), (20, 1007800), (25, 806240), (32, 629875), (40, 503900), (50, 403120), (80, 251950), (100, 201560), (125, 161248), (160, 125975), (200, 100780), (250, 80624), (400, 50390), (500, 40312), (800, 25195), (1000, 20156), (2000, 10078), (4000, 5039)]