128418800

素因数分解:

$2^4\times 5^2\times {\mathrm{321047}}^1$

素因数の和:321065

約数の個数: 30

約数和(自身を含む): 308527128

約数和(自身を除く): 180108328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 321047, 642094, 1284188, 1605235, 2568376, 3210470, 5136752, 6420940, 8026175, 12841880, 16052350, 25683760, 32104700, 64209400, 128418800]

約数ペア:

[(1, 128418800), (2, 64209400), (4, 32104700), (5, 25683760), (8, 16052350), (10, 12841880), (16, 8026175), (20, 6420940), (25, 5136752), (40, 3210470), (50, 2568376), (80, 1605235), (100, 1284188), (200, 642094), (400, 321047)]