20736640

素因数分解:

$2^7\times 5^1\times {\mathrm{32401}}^1$

素因数の和:32420

約数の個数: 32

約数和(自身を含む): 49575060

約数和(自身を除く): 28838420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32401, 64802, 129604, 162005, 259208, 324010, 518416, 648020, 1036832, 1296040, 2073664, 2592080, 4147328, 5184160, 10368320, 20736640]

約数ペア:

[(1, 20736640), (2, 10368320), (4, 5184160), (5, 4147328), (8, 2592080), (10, 2073664), (16, 1296040), (20, 1036832), (32, 648020), (40, 518416), (64, 324010), (80, 259208), (128, 162005), (160, 129604), (320, 64802), (640, 32401)]