438400

素因数分解:

$2^7\times 5^2\times {\mathrm{137}}^1$

素因数の和:161

約数の個数: 48

約数和(自身を含む): 1090890

約数和(自身を除く): 652490

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 137, 160, 200, 274, 320, 400, 548, 640, 685, 800, 1096, 1370, 1600, 2192, 2740, 3200, 3425, 4384, 5480, 6850, 8768, 10960, 13700, 17536, 21920, 27400, 43840, 54800, 87680, 109600, 219200, 438400]

約数ペア:

[(1, 438400), (2, 219200), (4, 109600), (5, 87680), (8, 54800), (10, 43840), (16, 27400), (20, 21920), (25, 17536), (32, 13700), (40, 10960), (50, 8768), (64, 6850), (80, 5480), (100, 4384), (128, 3425), (137, 3200), (160, 2740), (200, 2192), (274, 1600), (320, 1370), (400, 1096), (548, 800), (640, 685)]