19858000

素因数分解:

$2^4\times 5^3\times {\mathrm{9929}}^1$

素因数の和:9952

約数の個数: 40

約数和(自身を含む): 48021480

約数和(自身を除く): 28163480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 9929, 19858, 39716, 49645, 79432, 99290, 158864, 198580, 248225, 397160, 496450, 794320, 992900, 1241125, 1985800, 2482250, 3971600, 4964500, 9929000, 19858000]

約数ペア:

[(1, 19858000), (2, 9929000), (4, 4964500), (5, 3971600), (8, 2482250), (10, 1985800), (16, 1241125), (20, 992900), (25, 794320), (40, 496450), (50, 397160), (80, 248225), (100, 198580), (125, 158864), (200, 99290), (250, 79432), (400, 49645), (500, 39716), (1000, 19858), (2000, 9929)]