640009984

素因数分解:

$2^8\times {\mathrm{19}}^1\times {\mathrm{131581}}^1$

素因数の和:131616

約数の個数: 36

約数和(自身を含む): 1344768040

約数和(自身を除く): 704758056

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 128, 152, 256, 304, 608, 1216, 2432, 4864, 131581, 263162, 526324, 1052648, 2105296, 2500039, 4210592, 5000078, 8421184, 10000156, 16842368, 20000312, 33684736, 40000624, 80001248, 160002496, 320004992, 640009984]

約数ペア:

[(1, 640009984), (2, 320004992), (4, 160002496), (8, 80001248), (16, 40000624), (19, 33684736), (32, 20000312), (38, 16842368), (64, 10000156), (76, 8421184), (128, 5000078), (152, 4210592), (256, 2500039), (304, 2105296), (608, 1052648), (1216, 526324), (2432, 263162), (4864, 131581)]