639878656

素因数分解:

$2^9\times {\mathrm{19}}^1\times {\mathrm{65777}}^1$

素因数の和:65814

約数の個数: 40

約数和(自身を含む): 1345817880

約数和(自身を除く): 705939224

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 128, 152, 256, 304, 512, 608, 1216, 2432, 4864, 9728, 65777, 131554, 263108, 526216, 1052432, 1249763, 2104864, 2499526, 4209728, 4999052, 8419456, 9998104, 16838912, 19996208, 33677824, 39992416, 79984832, 159969664, 319939328, 639878656]

約数ペア:

[(1, 639878656), (2, 319939328), (4, 159969664), (8, 79984832), (16, 39992416), (19, 33677824), (32, 19996208), (38, 16838912), (64, 9998104), (76, 8419456), (128, 4999052), (152, 4209728), (256, 2499526), (304, 2104864), (512, 1249763), (608, 1052432), (1216, 526216), (2432, 263108), (4864, 131554), (9728, 65777)]