28181335

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{257}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 41956992

約数和(自身を除く): 13775657

約数列:

[1, 5, 7, 13, 35, 65, 91, 241, 257, 455, 1205, 1285, 1687, 1799, 3133, 3341, 8435, 8995, 15665, 16705, 21931, 23387, 61937, 109655, 116935, 309685, 433559, 805181, 2167795, 4025905, 5636267, 28181335]

約数ペア:

[(1, 28181335), (5, 5636267), (7, 4025905), (13, 2167795), (35, 805181), (65, 433559), (91, 309685), (241, 116935), (257, 109655), (455, 61937), (1205, 23387), (1285, 21931), (1687, 16705), (1799, 15665), (3133, 8995), (3341, 8435)]