208704640

素因数分解:

$2^7\times 5^1\times {\mathrm{326101}}^1$

素因数の和:326120

約数の個数: 32

約数和(自身を含む): 498936060

約数和(自身を除く): 290231420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 326101, 652202, 1304404, 1630505, 2608808, 3261010, 5217616, 6522020, 10435232, 13044040, 20870464, 26088080, 41740928, 52176160, 104352320, 208704640]

約数ペア:

[(1, 208704640), (2, 104352320), (4, 52176160), (5, 41740928), (8, 26088080), (10, 20870464), (16, 13044040), (20, 10435232), (32, 6522020), (40, 5217616), (64, 3261010), (80, 2608808), (128, 1630505), (160, 1304404), (320, 652202), (640, 326101)]