19936640

素因数分解:

$2^7\times 5^1\times {\mathrm{31151}}^1$

素因数の和:31170

約数の個数: 32

約数和(自身を含む): 47662560

約数和(自身を除く): 27725920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31151, 62302, 124604, 155755, 249208, 311510, 498416, 623020, 996832, 1246040, 1993664, 2492080, 3987328, 4984160, 9968320, 19936640]

約数ペア:

[(1, 19936640), (2, 9968320), (4, 4984160), (5, 3987328), (8, 2492080), (10, 1993664), (16, 1246040), (20, 996832), (32, 623020), (40, 498416), (64, 311510), (80, 249208), (128, 155755), (160, 124604), (320, 62302), (640, 31151)]