18720640

素因数分解:

$2^7\times 5^1\times {\mathrm{29251}}^1$

素因数の和:29270

約数の個数: 32

約数和(自身を含む): 44755560

約数和(自身を除く): 26034920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 29251, 58502, 117004, 146255, 234008, 292510, 468016, 585020, 936032, 1170040, 1872064, 2340080, 3744128, 4680160, 9360320, 18720640]

約数ペア:

[(1, 18720640), (2, 9360320), (4, 4680160), (5, 3744128), (8, 2340080), (10, 1872064), (16, 1170040), (20, 936032), (32, 585020), (40, 468016), (64, 292510), (80, 234008), (128, 146255), (160, 117004), (320, 58502), (640, 29251)]