81978416

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{5399}}^1$

素因数の和:5493

約数の個数: 40

約数和(自身を含む): 173426400

約数和(自身を除く): 91447984

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 146, 208, 292, 584, 949, 1168, 1898, 3796, 5399, 7592, 10798, 15184, 21596, 43192, 70187, 86384, 140374, 280748, 394127, 561496, 788254, 1122992, 1576508, 3153016, 5123651, 6306032, 10247302, 20494604, 40989208, 81978416]

約数ペア:

[(1, 81978416), (2, 40989208), (4, 20494604), (8, 10247302), (13, 6306032), (16, 5123651), (26, 3153016), (52, 1576508), (73, 1122992), (104, 788254), (146, 561496), (208, 394127), (292, 280748), (584, 140374), (949, 86384), (1168, 70187), (1898, 43192), (3796, 21596), (5399, 15184), (7592, 10798)]