81807928

素因数分解:

$2^3\times {\mathrm{131}}^1\times {\mathrm{251}}^1\times {\mathrm{311}}^1$

素因数の和:699

約数の個数: 32

約数和(自身を含む): 155675520

約数和(自身を除く): 73867592

約数列:

[1, 2, 4, 8, 131, 251, 262, 311, 502, 524, 622, 1004, 1048, 1244, 2008, 2488, 32881, 40741, 65762, 78061, 81482, 131524, 156122, 162964, 263048, 312244, 325928, 624488, 10225991, 20451982, 40903964, 81807928]

約数ペア:

[(1, 81807928), (2, 40903964), (4, 20451982), (8, 10225991), (131, 624488), (251, 325928), (262, 312244), (311, 263048), (502, 162964), (524, 156122), (622, 131524), (1004, 81482), (1048, 78061), (1244, 65762), (2008, 40741), (2488, 32881)]