81378425

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:246

約数の個数: 36

約数和(自身を含む): 108850176

約数和(自身を除く): 27471751

約数列:

[1, 5, 19, 25, 71, 95, 127, 355, 361, 475, 635, 1349, 1775, 1805, 2413, 3175, 6745, 9017, 9025, 12065, 25631, 33725, 45085, 45847, 60325, 128155, 171323, 225425, 229235, 640775, 856615, 1146175, 3255137, 4283075, 16275685, 81378425]

約数ペア:

[(1, 81378425), (5, 16275685), (19, 4283075), (25, 3255137), (71, 1146175), (95, 856615), (127, 640775), (355, 229235), (361, 225425), (475, 171323), (635, 128155), (1349, 60325), (1775, 45847), (1805, 45085), (2413, 33725), (3175, 25631), (6745, 12065), (9017, 9025)]