21554800

素因数分解:

$2^4\times 5^2\times {\mathrm{53887}}^1$

素因数の和:53905

約数の個数: 30

約数和(自身を含む): 51786368

約数和(自身を除く): 30231568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53887, 107774, 215548, 269435, 431096, 538870, 862192, 1077740, 1347175, 2155480, 2694350, 4310960, 5388700, 10777400, 21554800]

約数ペア:

[(1, 21554800), (2, 10777400), (4, 5388700), (5, 4310960), (8, 2694350), (10, 2155480), (16, 1347175), (20, 1077740), (25, 862192), (40, 538870), (50, 431096), (80, 269435), (100, 215548), (200, 107774), (400, 53887)]