31781517

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 46531584

約数和(自身を除く): 14750067

約数列:

[1, 3, 17, 51, 67, 71, 131, 201, 213, 393, 1139, 1207, 2227, 3417, 3621, 4757, 6681, 8777, 9301, 14271, 26331, 27903, 80869, 149209, 158117, 242607, 447627, 474351, 623167, 1869501, 10593839, 31781517]

約数ペア:

[(1, 31781517), (3, 10593839), (17, 1869501), (51, 623167), (67, 474351), (71, 447627), (131, 242607), (201, 158117), (213, 149209), (393, 80869), (1139, 27903), (1207, 26331), (2227, 14271), (3417, 9301), (3621, 8777), (4757, 6681)]